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/configs/chromebook_samus_tpl_defconfig b/configs/chromebook_samus_tpl_defconfig
index 6eef4ba..d97c305 100644
--- a/configs/chromebook_samus_tpl_defconfig
+++ b/configs/chromebook_samus_tpl_defconfig
@@ -36,9 +36,9 @@
 CONFIG_SPL_DM_SPI_FLASH=y
 CONFIG_SPL_NET_SUPPORT=y
 CONFIG_SPL_PCI=y
-CONFIG_SPL_PCH_SUPPORT=y
+CONFIG_SPL_PCH=y
 CONFIG_TPL_PCI=y
-CONFIG_TPL_PCH_SUPPORT=y
+CONFIG_TPL_PCH=y
 CONFIG_TPL_DM_SPI=y
 CONFIG_TPL_DM_SPI_FLASH=y
 CONFIG_HUSH_PARSER=y