drm: sti: fix check for clk_pix_main
drm: sti: fix check for clk_pix_main

copy-paste wasn't followed by editing, do it.

Signed-off-by: Jassi Brar <191fbc354bb0d45dfb103e8f4f6583bfe2bb3ef7@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs