arm: mach-k3: j722_spl: Add FAST XSPI boot mode

Fast XSPI boot mode is supported by J722S ROM, add that.

Signed-off-by: Vaishnav Achath <vaishnav.a@ti.com>
Signed-off-by: Prasanth Babu Mantena <p-mantena@ti.com>
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
diff --git a/arch/arm/mach-k3/include/mach/j722s_spl.h b/arch/arm/mach-k3/include/mach/j722s_spl.h
index eab8c51..a91cc82 100644
--- a/arch/arm/mach-k3/include/mach/j722s_spl.h
+++ b/arch/arm/mach-k3/include/mach/j722s_spl.h
@@ -24,6 +24,7 @@
 #define BOOT_DEVICE_DFU			0x0A
 #define BOOT_DEVICE_GPMC_NAND		0x0B
 #define BOOT_DEVICE_GPMC_NOR		0x0C
+#define BOOT_DEVICE_FAST_XSPI		0x0D
 #define BOOT_DEVICE_XSPI		0x0E
 #define BOOT_DEVICE_NOBOOT		0x0F
 
diff --git a/arch/arm/mach-k3/j722s/j722s_init.c b/arch/arm/mach-k3/j722s/j722s_init.c
index 01b0068..c4d9914 100644
--- a/arch/arm/mach-k3/j722s/j722s_init.c
+++ b/arch/arm/mach-k3/j722s/j722s_init.c
@@ -219,6 +219,8 @@
 		fallthrough;
 	case BOOT_DEVICE_XSPI:
 		fallthrough;
+	case BOOT_DEVICE_FAST_XSPI:
+		fallthrough;
 	case BOOT_DEVICE_SPI:
 		return BOOT_DEVICE_SPI;