RDMA/uverbs: Fix -Wunused-function warning

make W=1 warns this:

In file included from drivers/infiniband/sw/rdmavt/mmap.c:51:0:
./include/rdma/uverbs_ioctl.h:937:1:
warning: ‘_uverbs_get_const_unsigned’ defined but not used [-Wunused-function]
_uverbs_get_const_unsigned(u64 *to,
^~~~~~~~~~~~~~~~~~~~~~~~~~
./include/rdma/uverbs_ioctl.h:930:1:
warning: ‘_uverbs_get_const_signed’ defined but not used [-Wunused-function]
_uverbs_get_const_signed(s64 *to, const struct uverbs_attr_bundle *attrs_bundle,
^~~~~~~~~~~~~~~~~~~~~~~~

Make these functions inline to fix this warnings.

Fixes: 2904bb37b35d ("IB/core: Split uverbs_get_const/default to consider target type")
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: YueHaibing <[e-mail]>
Signed-off-by: Jason Gunthorpe <[e-mail]>

include/rdma/uverbs_ioctl.h

···
 {
 	return -EINVAL;
 }
-static int
-_uverbs_get_const_signed(s64 *to, const struct uverbs_attr_bundle *attrs_bundle,
+static inline int
+_uverbs_get_const_signed(s64 *to,
+			 const struct uverbs_attr_bundle *attrs_bundle,
 			 size_t idx, s64 lower_bound, u64 upper_bound,
 			 s64 *def_val)
 {
 	return -EINVAL;
 }
-static int
+static inline int
 _uverbs_get_const_unsigned(u64 *to,
 			   const struct uverbs_attr_bundle *attrs_bundle,
 			   size_t idx, u64 upper_bound, u64 *def_val)