pch: Rename PCH_SUPPORT to PCH

Rename these options so that CONFIG_IS_ENABLED can be used with them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index f640069..93eff14 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -1004,7 +1004,7 @@
 	  necessary driver support. This enables the drivers in drivers/pci
 	  as part of an SPL build.
 
-config SPL_PCH_SUPPORT
+config SPL_PCH
 	bool "Support PCH drivers"
 	help
 	  Enable support for PCH (Platform Controller Hub) devices in SPL.
@@ -1540,7 +1540,7 @@
 	  necessary driver support. This enables the drivers in drivers/pci
 	  as part of a TPL build.
 
-config TPL_PCH_SUPPORT
+config TPL_PCH
 	bool "Support PCH drivers"
 	help
 	  Enable support for PCH (Platform Controller Hub) devices in TPL.