misc: ti-st: st_kim: remove the driver

This driver has only ever been used by the omap4-panda board file. This
file has been gone for over 10 years. Let it go.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20241016094117.16654-1-brgl@bgdev.pl


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>