msm: sde: add query for max line width supported by rotator

Maximum line width is used by client to determine the maximum
input image width for rotator. Add query support for maximum
line width supported by rotator. The value of maximum line
width can be overridden in device tree.

CRs-Fixed: 2009714
Change-Id: I8d1a04560f108ddc5b4726646333339500ba80b6
Signed-off-by: Alan Kwong <akwong@codeaurora.org>