fix up for "net: add new socket option SO_RESERVE_MEM"

Some architectures do not include uapi/asm/socket.h

Fixes: 2bb2f5fb ("net: add new socket option SO_RESERVE_MEM")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/alpha/include/uapi/asm/socket.h

@@ -131,6 +131,8 @@
 
 #define SO_BUF_LOCK		72
 
+#define SO_RESERVE_MEM		73
+
 #if !defined(__KERNEL__)
 
 #if __BITS_PER_LONG == 64

arch/mips/include/uapi/asm/socket.h

@@ -142,6 +142,8 @@
 
 #define SO_BUF_LOCK		72
 
+#define SO_RESERVE_MEM		73
+
 #if !defined(__KERNEL__)
 
 #if __BITS_PER_LONG == 64

arch/parisc/include/uapi/asm/socket.h

@@ -123,6 +123,8 @@
 
 #define SO_BUF_LOCK		0x4046
 
+#define SO_RESERVE_MEM		0x4047
+
 #if !defined(__KERNEL__)
 
 #if __BITS_PER_LONG == 64