pwm: raspberrypi-poe: Fix spelling mistake "Firwmware" -> "Firmware"

There is a spelling mistake in the PWM_RASPBERRYPI_POE Kconfig,
fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20250724104148.139559-1-colin.i.king@gmail.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>

Author: ColinIanKing

drivers/pwm/Kconfig

@@ -536,7 +536,7 @@ config PWM_PXA
 	  will be called pwm-pxa.
 
 config PWM_RASPBERRYPI_POE
-	tristate "Raspberry Pi Firwmware PoE Hat PWM support"
+	tristate "Raspberry Pi Firmware PoE Hat PWM support"
 	# Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only
 	# happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.
 	depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)