serial/imx: propagate error from of_alias_get_id instead of using -ENODEV
serial/imx: propagate error from of_alias_get_id instead of using -ENODEV

A quick look at of_alias_get_id shows that in the error case it returns
-ENODEV, too, but still it's better style to propagate the value as is.

Signed-off-by: Uwe Kleine-König <181323dd666a182bc2d953e52d0ac3ab54cd8391@pengutronix.de>
Cc: Shawn Guo <912cf7eb7d8018e2943586ae6657d21fd4e38239@linaro.org>
Cc: Alan Cox <91e38e63b890fbb214c8914809fde03c73e7f24d@linux.intel.com>
Cc: Grant Likely <9069e6f5a2b566e2674a0ba1e2bf39c12c195fad@secretlab.ca>
Cc: Jeremy Kerr <ed2ecf6f990cdec851e11d5bf34a3b771a0783cf@canonical.com>
Cc: Jason Liu <66a0170c08efb4ece6ee13480106292e30529a81@linaro.org>
Cc: Sascha Hauer <c00cbc2b736c26791a3822db86f8796fe9efff67@pengutronix.de>
Acked-by: Jason Liu <66a0170c08efb4ece6ee13480106292e30529a81@linaro.org>
Signed-off-by: Shawn Guo <912cf7eb7d8018e2943586ae6657d21fd4e38239@linaro.org>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@suse.de>

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