usb: typec: tipd: remove unused tps6598x_write16,32 functions

usb: typec: tipd: remove unused tps6598x_write16,32 functions

clang with W=1 reports
drivers/usb/typec/tipd/core.c:180:19: error: unused function
  'tps6598x_write16' [-Werror,-Wunused-function]
static inline int tps6598x_write16(struct tps6598x *tps, u8 reg, u16 val)
                  ^
drivers/usb/typec/tipd/core.c:185:19: error: unused function
  'tps6598x_write32' [-Werror,-Wunused-function]
static inline int tps6598x_write32(struct tps6598x *tps, u8 reg, u32 val)
                  ^
These static functions are not used, so remove them.

Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Jun Nie <jun.nie@linaro.org>
Link: https://lore.kernel.org/r/20230319133732.1702841-1-trix@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>