lcd: move platform-specific structs to their own headers

lcd: move platform-specific structs to their own headers

common/lcd code is full of platform-specific code and definitions, which
ideally should reside with the respective driver code. Take a step towards that
goal by moving platform-specific structs from lcd.h to their own header files.

The structs for the generic case (the #else for all the platform-specific
cases) is retained in lcd.h as the default case.

Signed-off-by: Nikita Kiryanov <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Tested-by: Bo Shen <[email protected]>
Tested-by: Josh Wu <[email protected]>
Cc: Bo Shen <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Anatolij Gustschin <[email protected]>