soc/intel/common: Clean up PMC library GPE handling API

1. Update gpe handling function names to explicitly mention if they
are operating on:
 a. STD GPE events
 b. GPIO GPE events
 c. Both
2. Update comment block in pmclib.h to use generic names for STD and
GPIO GPE registers instead of using any one platform specific names.

BUG=b:67712608

Change-Id: I03349fe85ac31d4215418b884afd8c4b531e68d3
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/21968
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c
index 666ef83..b9ed5b4 100644
--- a/src/soc/intel/apollolake/pmutil.c
+++ b/src/soc/intel/apollolake/pmutil.c
@@ -108,7 +108,7 @@
 	return tco_sts_bits;
 }
 
-const char *const *soc_gpe_sts_array(size_t *a)
+const char *const *soc_std_gpe_sts_array(size_t *a)
 {
 	static const char *const gpe_sts_bits[] = {
 		[0] = "PCIE_SCI",
@@ -151,7 +151,7 @@
 	write32((void *)(pmc_bar + GEN_PMCON1), gen_pmcon1 & ~RPS);
 }
 
-void soc_get_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
+void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
 {
 	DEVTREE_CONST struct soc_intel_apollolake_config *config;