msm: camera: isp: Fix command length check.

The driver interface for getting MAX clock is 32 bit value. Check for
userspace container is modified to verify agains that type and not against
long which can be with different size.

Change-Id: Ieb0b11cc93d6c334e158f3067d33a198fefa4fdc
Signed-off-by: Petar Sivenov <psiven@codeaurora.org>