soc/intel/tigerlake: add soc implementation for ETR address API

Add soc_pmc_etr_addr function definition in tigerlake SOC code.
The function is declared in common soc intel pmc driver.

Change-Id: Icc471b16304c72a9341abdd9797ba3f8d0d3d1bc
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37555
Reviewed-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-by: Wonkyu Kim <wonkyu.kim@intel.com>
Reviewed-by: Ravishankar Sarawadi <ravishankar.sarawadi@intel.corp-partner.google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/tigerlake/pmutil.c

@@ -177,6 +177,12 @@ uintptr_t soc_read_pmc_base(void)
 	return (uintptr_t)pmc_mmio_regs();
 }
 
+
+uint32_t *soc_pmc_etr_addr(void)
+{
+	return (uint32_t *)(soc_read_pmc_base() + ETR);
+}
+
 void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
 {
 	DEVTREE_CONST struct soc_intel_tigerlake_config *config;