[nrf fromlist] modules: hal_nordic: nrfx: make NRFX_SPI(M/S) selectable

Since selectable per-instance configs are removed, allow
selecting the general symbol for driver.

Upstream PR #: 96792

Signed-off-by: Michał Stasiak <[email protected]>

Author: mstasiaknordic

modules/hal_nordic/nrfx/Kconfig

@@ -526,10 +526,10 @@ config NRFX_SPI2
 	select NRFX_SPI
 
 config NRFX_SPIM
-	bool
+	bool "SPIM driver"
 
 config NRFX_SPIS
-	bool
+	bool "SPIS driver"
 
 config NRFX_SYSTICK
 	bool "SYSTICK driver"