simple_panel: support simple MIPI DSI panels

Re-use simple panel driver for MIPI DSI panels
which do not require additional DSI commands
for setup.

Tested-by: Robert Eckelmann <longnoserob@gmail.com> # ASUS TF101 T20
Tested-by: Nicolas Chauvet <kwizart@gmail.com> # Paz00
Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # ASUS TF700T T30
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>