sky130_fd_pr: Fix two small issues with the spice models.

[mithro]

• Fix incorrect usage of "temp" (and remove .param TEMP=27) which
  fixes Incorrect use of "temp" instead of "temper" in sky130_fd_pr__res_iso_pw.model.spice #171

• Fix incorrect inclusion paths which fixes
  Model binning for the MOSFETs does not cover the device lengths used in the standard cell decap cells. #228

Updating submodules on 2020-11-10 20:28:15 UTC

• Updating sky130_fd_pr latest to v0.20.1-44-gf62031a
• Updating sky130_fd_pr v0.10.0 to v0.10.0-8-g6a45d866
• Updating sky130_fd_pr v0.10.1 to v0.10.1-13-g5f8c2210
• Updating sky130_fd_pr v0.11.0 to v0.11.0-18-gc4243899
• Updating sky130_fd_pr v0.12.0 to v0.12.0-23-g0cd300ee
• Updating sky130_fd_pr v0.12.1 to v0.12.1-28-gbe3566d2
• Updating sky130_fd_pr v0.13.0 to v0.13.0-33-g32aede29
• Updating sky130_fd_pr v0.20.0 to v0.20.0-38-g9e08415b
• Updating sky130_fd_pr v0.20.1 to v0.20.1-44-gf62031a

• libraries/sky130_fd_pr/latest 6b9ba08...f62031a (3):

  spice: Remove .param TEMP=27.
  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

• libraries/sky130_fd_pr/v0.10.0 54c1ee1...6a45d86 (2):

  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

• libraries/sky130_fd_pr/v0.10.1 46a6658...5f8c221 (2):

  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

• libraries/sky130_fd_pr/v0.11.0 4596aee...c424389 (2):

  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

• libraries/sky130_fd_pr/v0.12.0 30e5e33...0cd300e (2):

  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

• libraries/sky130_fd_pr/v0.12.1 3f9ec20...be3566d (2):

  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

• libraries/sky130_fd_pr/v0.13.0 29fa6f3...32aede2 (2):

  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

• libraries/sky130_fd_pr/v0.20.0 66a8c2d...9e08415 (2):

  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

• libraries/sky130_fd_pr/v0.20.1 6b9ba08...f62031a (3):

  spice: Remove .param TEMP=27.
  Fix usage of "temp" instead of "temper" in spice models.
  Fixing including right pm3 file from spice corner files.

Signed-off-by: Tim 'mithro' Ansell me@mith.ro

[StefanSchippers]

checked all changes, it all looks correct to me...

Only one observation. Some changes were done on resistors by @diadatp since ngspice does not (according to his tests) support expressions for resistor temperature coefficients (tc1 and tc2). This is not an issue other than copying the values directly to the instance lines. There only is one case
(in res_xhigh_po/sky130_fd_pr__res_xhigh_po.model.spice) where tc1 is actually defined by an expression. Copying the number loses the formula dependence on parameters sky130_fd_pr__res_xhigh_po__var_mult and rsheet.
I don't know if setting tc1 = {-1.47e-3-5e-7*sky130_fd_pr__res_xhigh_po__var_mult*rsheet} on instance line works.

-rbody t1 t2 resbody r = {rbody*(1-bp2+bp2*sqrt(1+(bq2*abs(v(t1,t2))*Efac)**2))*
+rbody t1 t2 r = {rbody*(1-bp2+bp2*sqrt(1+(bq2*abs(v(t1,t2))*Efac)**2))*
 + (sub1+sub2*tanh(sub3*(min(v(r0,sub)+v(r1,sub),sub4)+sub5))) / (sub1+sub2*tanh(sub3*sub5)) }
++ tc1 = -1.47e-3
++ tc2 = 2.7e-6
+*+ tnom = 25.0
 .model resbody r tc1 = {-1.47e-3-5e-7*sky130_fd_pr__res_xhigh_po__var_mult*rsheet} tc2 = 2.7e-6 tnom = 25.0

[mithro]

Confirmed on the slack channel that the issues identified by @StefanSchippers shouldn't block this being merged.