ARM: 6827/1: mach-netx: delete hardcoded periphid

The periphid of the AMBA CLCD controller is hardcoded to a value
that the CLCD driver does not even support.

Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>