soc/intel/tigerlake: Rename pch_init() code

Rename the pch_init function to bootblock_pch_init and romstage_pch_init
according to the stage it is defined in.

TEST=successfully built and booted TGLRVP

Signed-off-by: Alexey Buyanov <alexey.buyanov@intel.com>
Change-Id: Ib7450fcdc3024dfb5e375a54f9bdcdca9bc373d8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44051
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>

src/soc/intel/tigerlake/bootblock/bootblock.c

@@ -25,7 +25,7 @@ void bootblock_soc_early_init(void)
 void bootblock_soc_init(void)
 {
 	report_platform_info();
-	pch_init();
+	bootblock_pch_init();
 
 	/* Programming TCO_BASE_ADDRESS and TCO Timer Halt */
 	tco_configure();

src/soc/intel/tigerlake/bootblock/pch.c

@@ -141,7 +141,7 @@ void pch_early_iorange_init(void)
 	pch_enable_lpc();
 }
 
-void pch_init(void)
+void bootblock_pch_init(void)
 {
 	/*
 	 * Enabling ABASE for accessing PM1_STS, PM1_EN, PM1_CNT,