RDMA/core: Commonize RDMA IOCTL declarations location

This patch provides one common file (rdma_user_ioctl.h)
for all RDMA UAPI IOCTLs.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/include/uapi/rdma/ib_user_mad.h b/include/uapi/rdma/ib_user_mad.h
index 09f809f..9de7a2b 100644
--- a/include/uapi/rdma/ib_user_mad.h
+++ b/include/uapi/rdma/ib_user_mad.h
@@ -35,7 +35,7 @@
 #define IB_USER_MAD_H
 
 #include <linux/types.h>
-#include <linux/ioctl.h>
+#include <rdma/rdma_user_ioctl.h>
 
 /*
  * Increment this value if any changes that break userspace ABI
@@ -230,8 +230,6 @@
 	__u8	reserved[3];
 };
 
-#define IB_IOCTL_MAGIC		0x1b
-
 #define IB_USER_MAD_REGISTER_AGENT	_IOWR(IB_IOCTL_MAGIC, 1, \
 					      struct ib_user_mad_reg_req)