IB/uverbs: Use the standard kConfig format for experimental

We really don't want people turning this on just yet, make it very
clear with capital letters.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/Kconfig

@@ -35,7 +35,7 @@ config INFINIBAND_USER_ACCESS
 	  rdma-core <https://github.com/linux-rdma/rdma-core>.
 
 config INFINIBAND_EXP_USER_ACCESS
-	bool "Allow experimental support for Infiniband ABI"
+	bool "Enable the full uverbs ioctl interface (EXPERIMENTAL)"
 	depends on INFINIBAND_USER_ACCESS
 	---help---
 	  IOCTL based ABI support for Infiniband. This allows userspace