google/gru: Support Nefario rev0

Do not assert GPIO1_B3 otherwise BT would be disabled on Nefario.
Also, remove DVS support for CENTERLOGIC.

BUG=b:64702054, b:63537905
TEST=build coreboot

Change-Id: I350db2c080f2e41ae56413f5f895557978ef0ba8
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://review.coreboot.org/21176
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
diff --git a/src/mainboard/google/gru/pwm_regulator.c b/src/mainboard/google/gru/pwm_regulator.c
index 3ee74a4..6a9f171 100644
--- a/src/mainboard/google/gru/pwm_regulator.c
+++ b/src/mainboard/google/gru/pwm_regulator.c
@@ -40,7 +40,7 @@
 	[PWM_REGULATOR_CENTERLOG] = {8001, 10497}
 };
 
-/* Applies for Gru rev2+ and Bob. */
+/* Applies for Gru rev2+, Bob, and Nefario. */
 int pwm_design_voltage[][2] = {
 	[PWM_REGULATOR_GPU] = {7864, 12177},
 	[PWM_REGULATOR_BIG] = {8001, 13022},
@@ -58,12 +58,15 @@
 int pwm_enum_to_pwm_number[] = {
 	[PWM_REGULATOR_GPU] = 0,
 	[PWM_REGULATOR_LIT] = 2,
+#if IS_ENABLED(CONFIG_GRU_HAS_CENTERLOG_PWM)
+	[PWM_REGULATOR_CENTERLOG] = 3,
+#else
+	[PWM_REGULATOR_CENTERLOG] = -1,
+#endif
 #if IS_ENABLED(CONFIG_BOARD_GOOGLE_SCARLET)
 	[PWM_REGULATOR_BIG] = 3,
-	[PWM_REGULATOR_CENTERLOG] = -1,	/* fixed regulator on Scarlet */
 #else
 	[PWM_REGULATOR_BIG] = 1,
-	[PWM_REGULATOR_CENTERLOG] = 3,
 #endif
 };