drivers/dax: Remove "select SRCU"

Now that the SRCU Kconfig option is unconditionally selected, there is
no longer any point in selecting it.  Therefore, remove the "select SRCU"
Kconfig statements.

Signed-off-by: Paul E. McKenney <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Vishal Verma <[email protected]>
Cc: Dave Jiang <[email protected]>
Cc: <[email protected]>
Acked-by: Dan Williams <[email protected]>
Reviewed-by: John Ogness <[email protected]>

Author: paulmckrcu

drivers/dax/Kconfig

@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig DAX
 	tristate "DAX: direct access to differentiated memory"
-	select SRCU
 	default m if NVDIMM_DAX
 
 if DAX