[media] drx-j: Simplify logic expressions

Don't need to test boolean x == true or x == false.

That makes the code more compact.

patch generated with make coccicheck and manually reviewed.

While here, remove uneeded ';'.

Acked-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>