[media] xc5000: Don't wrap msleep()

There's absolutely no reason to wrap msleep() call here.
Just rename all occurences of xc_wait() with msleep() and
remove the wrapper function.

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --cc drivers/media/tuners/xc5000.c
Simple merge