Tegra: platform: add function to check t194 chip

This patch adds tegra_chipid_is_t194() function to check if it is a
Tegra 194 chip.

Change-Id: I6da6d3a2c9676b748931e42fde1b174cbcb4fd40
Signed-off-by: David Pu <dpu@nvidia.com>

plat/nvidia/tegra/common/tegra_platform.c

@@ -108,6 +108,13 @@ bool tegra_chipid_is_t210_b01(void)
 	return (tegra_chipid_is_t210() && (tegra_get_chipid_major() == 0x2U));
 }
 
+bool tegra_chipid_is_t194(void)
+{
+	uint32_t chip_id = (tegra_get_chipid() >> CHIP_ID_SHIFT) & CHIP_ID_MASK;
+
+	return (chip_id == TEGRA_CHIPID_TEGRA19);
+}
+
 /*
  * Read the chip ID value and derive the platform
  */

plat/nvidia/tegra/include/tegra_platform.h

@@ -30,6 +30,7 @@
 #define TEGRA_CHIPID_TEGRA13		U(0x13)
 #define TEGRA_CHIPID_TEGRA21		U(0x21)
 #define TEGRA_CHIPID_TEGRA18		U(0x18)
+#define TEGRA_CHIPID_TEGRA19		U(0x19)
 
 /*******************************************************************************
  * JEDEC Standard Manufacturer's Identification Code and Bank ID
@@ -52,6 +53,7 @@ bool tegra_chipid_is_t132(void);
 bool tegra_chipid_is_t186(void);
 bool tegra_chipid_is_t210(void);
 bool tegra_chipid_is_t210_b01(void);
+bool tegra_chipid_is_t194(void);
 
 /*
  * Tegra platform identifiers