imx: imxrt1050-evk: Add support for SPI flash booting

Add support for booting the imxrt1050-evk from spi.
Add imximage config and the ability for SPL to boot from NOR.
Enable binman in Kconfig and device tree for imxrt* as it is used to
prepend fspi_header.bin to SPL and u-boot.img.

Signed-off-by: Jesse Taube <Mr.Bossman075@gmail.com>
diff --git a/include/configs/imxrt1050-evk.h b/include/configs/imxrt1050-evk.h
index 2af2dde..b370e25 100644
--- a/include/configs/imxrt1050-evk.h
+++ b/include/configs/imxrt1050-evk.h
@@ -25,4 +25,10 @@
 		"stderr=serial,vidconsole\0"
 #endif
 
+/*
+ * Address of U-Boot for SPI NOR boot
+ */
+
+#define CFG_SYS_UBOOT_BASE			0x60010000
+
 #endif /* __IMXRT1050_EVK_H */