spl: fit: Add ability to jump to Linux via OPTEE-OS on ARMv7a

Add support for jumping to Linux kernel through OPTEE-OS on ARMv7a to SPL.
This is already supported on ARMv8a, this patch adds the ARMv7a support.
Extend the SPL fitImage loader to record OPTEE-OS load address and in case
the load address is non-zero, use the same bootm-optee.S code used by the
U-Boot fitImage jump code to start OPTEE-OS first and jump to Linux next.

Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>

include/spl.h

@@ -288,6 +288,9 @@ struct spl_image_info {
 	ulong entry_point;
 #if CONFIG_IS_ENABLED(LOAD_FIT) || CONFIG_IS_ENABLED(LOAD_FIT_FULL)
 	void *fdt_addr;
+#endif
+#if defined(CONFIG_BOOTM_OPTEE) && defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
+	ulong optee_addr;
 #endif
 	u32 boot_device;
 	u32 offset;