soc/intel/baytrail: Rename "pmc.h" to "pm.h"

This reduces the differences between Bay Trail and Braswell.

Tested with BUILD_TIMELESS=1, Google Ninja remains identical.

Change-Id: I3d4c1285bdc4b061383b7bb6262f69671166b9c4
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43185
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>

src/soc/intel/baytrail/gpio.c

@@ -5,7 +5,7 @@
 #include <device/pci.h>
 #include <console/console.h>
 #include <soc/gpio.h>
-#include <soc/pmc.h>
+#include <soc/pm.h>
 #include <soc/smm.h>
 
 /* GPIO-to-Pad LUTs */