arm64: defconfig: Add Renesas TPU as module

For better build and test coverage.
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: NNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20210915153143.25184-1-wsa+renesas@sang-engineering.comSigned-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/configs/defconfig

@@ -1092,6 +1092,7 @@ CONFIG_PWM_MESON=m
 CONFIG_PWM_MTK_DISP=m
 CONFIG_PWM_MEDIATEK=m
 CONFIG_PWM_RCAR=m
+CONFIG_PWM_RENESAS_TPU=m
 CONFIG_PWM_ROCKCHIP=y
 CONFIG_PWM_SAMSUNG=y
 CONFIG_PWM_SL28CPLD=m