mainboard/(i945,ich7): Remove commented RCBA32(0x341c) code

PCIe root port clock gate is already enabled at i945/early_init.c
Also fix comments when only PCIe root port is enabled.

Change-Id: Ica38529dbdd5cc51b19b426999a1d9f0b678b4f5
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37576
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/i945/early_init.c b/src/northbridge/intel/i945/early_init.c
index 13dce61..6629a0e 100644
--- a/src/northbridge/intel/i945/early_init.c
+++ b/src/northbridge/intel/i945/early_init.c
@@ -837,6 +837,7 @@
 
 static void ich7_setup_pci_express(void)
 {
+	/* Enable PCIe Root Port Clock Gate */
 	RCBA32(CG) |= (1 << 0);
 
 	/* Initialize slot power limit for root ports */