spear: Use upper case for CONFIG options

There are a few options which use lower case. We should use upper case for
all CONFIG options.

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Add usbtty/nand hunk to include/configs/spear3xx_evb.h]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/spear310_nand_defconfig b/configs/spear310_nand_defconfig
index 2feb9ccf..2ae7bf2 100644
--- a/configs/spear310_nand_defconfig
+++ b/configs/spear310_nand_defconfig
@@ -1,6 +1,6 @@
 CONFIG_ARM=y
 CONFIG_TARGET_SPEAR310=y
-CONFIG_SYS_EXTRA_OPTIONS="spear310,nand"
+CONFIG_SYS_EXTRA_OPTIONS="SPEAR310,NAND"
 CONFIG_BOOTDELAY=1
 CONFIG_CMD_I2C=y
 # CONFIG_CMD_SETEXPR is not set