ARM: am33xx: define BOOT_DEVICE_ONENAND

am33xx does not support OneNAND, but we need this define anyway
to let UBI SPL code compile.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Tested-by: Pau Pajuelo <ppajuel@gmail.com>

arch/arm/include/asm/arch-am33xx/spl.h

@@ -47,6 +47,7 @@
 #define BOOT_DEVICE_UART	0x41
 #define BOOT_DEVICE_USBETH	0x44
 #define BOOT_DEVICE_CPGMAC	0x46
+#define BOOT_DEVICE_ONENAND	0xFF /* ROM does not support OneNAND. */
 
 #define MMC_BOOT_DEVICES_START	BOOT_DEVICE_MMC1
 #define MMC_BOOT_DEVICES_END	BOOT_DEVICE_MMC2