drivers: display: st7735r: replace non-existing DT_INST_HAS_PROP
drivers: display: st7735r: replace non-existing DT_INST_HAS_PROP

DT_INST_HAS_PROP macro is not available, DT_INST_NODE_HAS_PROP needs to
be used instead.

Signed-off-by: Gerard Marull-Paretas <bedb45f43a286e49f4dcda039a436b216ae61ef3@nordicsemi.no>

zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr