spl: nor: Provide falcon boot support for NOR memories

This commit adds falcon boot support (by also copying args necessary for
booting) to the SPL NOR memory driver.

After this change it is possible to use the falcon boot in the same way
as on NAND memories. The necessary configs (i.e. CONFIG_CMD_SPL_NOR_OFS)
are now defined in Kconfig.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/common/spl/spl_nor.c b/common/spl/spl_nor.c
index 7df708d..b1e79b9 100644
--- a/common/spl/spl_nor.c
+++ b/common/spl/spl_nor.c
@@ -51,6 +51,11 @@
 						  CONFIG_SYS_OS_BASE,
 						  (void *)header);
 
+#if defined CONFIG_SYS_SPL_ARGS_ADDR && defined CONFIG_CMD_SPL_NOR_OFS
+			memcpy((void *)CONFIG_SYS_SPL_ARGS_ADDR,
+			       (void *)CONFIG_CMD_SPL_NOR_OFS,
+			       CONFIG_CMD_SPL_WRITE_SIZE);
+#endif
 			return ret;
 		}
 #endif