[nrf fromlist] modules: hal_nordic: nrfx: Add description for NRFX_QDEC entry

Add description to QDEC Kconfig config.

Upstream PR #: 98571

Signed-off-by: Karol Lasończyk <[email protected]>

Author: kl-cruz

modules/hal_nordic/nrfx/Kconfig

@@ -345,7 +345,7 @@ config NRFX_PWM
 	bool
 
 config NRFX_QDEC
-	bool
+	bool "QDEC driver"
 
 config NRFX_QSPI
 	bool "QSPI driver"