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/spear300_usbtty_defconfig b/configs/spear300_usbtty_defconfig
index 5338418..5c67aeb 100644
--- a/configs/spear300_usbtty_defconfig
+++ b/configs/spear300_usbtty_defconfig
@@ -1,6 +1,6 @@
 CONFIG_ARM=y
 CONFIG_TARGET_SPEAR300=y
-CONFIG_SYS_EXTRA_OPTIONS="spear300,usbtty"
+CONFIG_SYS_EXTRA_OPTIONS="SPEAR300,USBTTY"
 CONFIG_BOOTDELAY=-1
 CONFIG_CMD_I2C=y
 # CONFIG_CMD_SETEXPR is not set