V4L/DVB: vpfe-capture - converting dm355 ccdc driver to a platform driver

V4L/DVB: vpfe-capture - converting dm355 ccdc driver to a platform driver

1) clocks are configured using generic clock names;
2) converts the driver to a platform driver;
3) cleanup - consolidate all static variables inside a structure, ccdc_cfg;

The ccdc now uses a generic name for clocks. "master" and "slave". On individual platforms
these clocks will inherit from the platform specific clock. This will allow re-use of
the driver for the same IP across different SoCs.

Updated based on Kevin's comments on clock configuration and error code (v3, v4).

Reviewed-by: Kevin Hilman <[email protected]>
Reviewed-by: Vaibhav Hiremath <[email protected]>
Reviewed-by: Hans Verkuil <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>
Signed-off-by: Muralidharan Karicheri <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>