[nrf fromtree] modules: hal_nordic: nrfx: use templates from hal_nordic

There is no reason to duplicate `nrfx_config_*.h` files.
Use configuration files from `hal_nordic/nrfx/templates`.

Signed-off-by: Marcin Szymczyk <[email protected]>
(cherry picked from commit aa3f787)

Author: masz-nordic

modules/hal_nordic/nrfx/Kconfig

@@ -1211,6 +1211,6 @@ endmenu
 
 config NRFX_RESERVED_RESOURCES_HEADER
 	string
-	default "nrfx_config_reserved_resources.h"
+	default "nrfx_reserved_resources.h"
 
 endmenu # "nrfx drivers"