iMX: Fix build for iMX53
iMX: Fix build for iMX53

Commit fad107086d5a869c1c07e5bb35b7b57a10ecf578 fixed the wrong test for MX51
as the MX51 addresses are wrong for MX50 and MX53 but now it's MX51 only,
UART_PADDR is not defined anymore when building for MX50/MX53.

Signed-off-by: Arnaud Patard <792745173c1ee81f4d7d786155d4c148b6e57204@rtp-net.org>
Tested-by: Steev Klimaszewski <dbfcf3a9ce3fce17cfdb7917a598ad9418d7f6b4@genesi-usa.com>
Signed-off-by: Sascha Hauer <c00cbc2b736c26791a3822db86f8796fe9efff67@pengutronix.de>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs