ARM: da850evm: Fix reading MAC from SPI

The MAC address is located at at the last 64K of SPI Flash, and
it's 6 bytes long.  This patch corrects both the length and
starting byte of the MAC address.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c
index 1bc2682..a90b7a3 100644
--- a/board/davinci/da8xxevm/da850evm.c
+++ b/board/davinci/da8xxevm/da850evm.c
@@ -62,7 +62,7 @@
 		return -1;
 	}
 
-	ret = spi_flash_read(flash, (CFG_MAC_ADDR_OFFSET) + 1, 7, addr);
+	ret = spi_flash_read(flash, (CFG_MAC_ADDR_OFFSET), 6, addr);
 	if (ret) {
 		printf("Error - unable to read MAC address from SPI flash.\n");
 		return -1;