Tegra: memctrl_v2: get chip revision using platform identifiers

This patch switches to the functions which identify the underlying
platform in order to calculate the chip SKU.

Change-Id: I20cf5623465289ccfab28d6578efcf762bfeb456
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c

@@ -38,6 +38,7 @@
 #include <smmu.h>
 #include <string.h>
 #include <tegra_def.h>
+#include <tegra_platform.h>
 #include <xlat_tables.h>
 
 #define TEGRA_GPU_RESET_REG_OFFSET	0x30
@@ -495,7 +496,6 @@ void tegra_memctrl_setup(void)
 	uint32_t num_overrides = sizeof(streamid_overrides) / sizeof(uint32_t);
 	uint32_t num_sec_cfgs = sizeof(sec_cfgs) / sizeof(mc_streamid_security_cfg_t);
 	uint32_t num_txn_overrides = sizeof(mc_override_cfgs) / sizeof(mc_txn_override_cfg_t);
-	uint32_t chip_minor, chip_major;
 	int i;
 
 	INFO("Tegra Memory Controller (v2)\n");
@@ -543,12 +543,8 @@ void tegra_memctrl_setup(void)
 	/*
 	 * Set the MC_TXN_OVERRIDE registers for write clients.
 	 */
-	chip_major = (mmio_read_32(TEGRA_MISC_BASE + HARDWARE_REVISION_OFFSET) >>
-			MAJOR_VERSION_SHIFT) & MAJOR_VERSION_MASK;
-	chip_minor = (mmio_read_32(TEGRA_MISC_BASE + HARDWARE_REVISION_OFFSET) >>
-			MINOR_VERSION_SHIFT) & MINOR_VERSION_MASK;
-
-	if ((chip_major == 0) || (chip_major > 0 && chip_minor == 1)) {
+	if (!tegra_platform_is_silicon() ||
+	    (tegra_platform_is_silicon() && tegra_get_chipid_minor() == 1)) {
 
 		/* GPU and NVENC settings for rev. A01 */
 		val = tegra_mc_read_32(MC_TXN_OVERRIDE_CONFIG_GPUSWR);