mfd: tps65219: Remove unused macros & add regmap.h

These macros are not used by the driver, and the structs are accounted
for with the addition of the linux/regmap.h file.

Signed-off-by: Shree Ramamoorthy <s-ramamoorthy@ti.com>
Link: https://lore.kernel.org/r/20241217204935.1012106-3-s-ramamoorthy@ti.com


Signed-off-by: Lee Jones <lee@kernel.org>