drm/bridge: samsung-dsim: allow configuring bits and offsets of CLKCTRL register

drm/bridge: samsung-dsim: allow configuring bits and offsets of CLKCTRL register

DSIM_CLKCTRL bit and offset values hardcoded in the driver:

name                      | bit/offset value
--------------------------+-----------------
DSIM_LANE_ESC_CLK_EN_CLK  | 19
DSIM_LANE_ESC_CLK_EN_DATA | 20
DSIM_BYTE_CLKEN           | 24
DSIM_ESC_CLKEN            | 28
DSIM_TX_REQUEST_HSCLK     | 31

DSIM_CLKCTRL bit and offset values in Exynos7870 DSIM as per downstream
kernel sources:

name                      | bit/offset value
--------------------------+-----------------
DSIM_LANE_ESC_CLK_EN_CLK  | 8
DSIM_LANE_ESC_CLK_EN_DATA | 9
DSIM_BYTE_CLKEN           | 17
DSIM_ESC_CLKEN            | 16
DSIM_TX_REQUEST_HSCLK     | 20

In order to support both, move all values to the driver data struct and
define it for every driver compatible. Reference the values from there
instead, in functions wherever required.

Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>