[media] omap: simplify test logic

[media] omap: simplify test logic

instead of testing bools if they are false or true, just use
if (!foo) or if (foo). That makes the code easier to
read and shorter.

Also, properly initialize booleans with true or false.

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