TI:armv7: Enable CONFIG_CMD_SPI

Add the generic "poke the SPI bus" command, with the SPI related
defines.

Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>

include/configs/ti_armv7_common.h

@@ -76,6 +76,7 @@
 /* McSPI IP block */
 #define CONFIG_SPI
 #define CONFIG_OMAP3_SPI
+#define CONFIG_CMD_SPI
 
 /* GPIO block */
 #define CONFIG_OMAP_GPIO