MIPS: Declare uasm bbit0 and bbit1 functions.

these are already defined, but declaring them allow them to be used
outside of uasm.c.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1872/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/uasm.h

@@ -117,6 +117,8 @@ Ip_u2u1u3(_xori);
 Ip_u2u1msbu3(_dins);
 Ip_u2u1msbu3(_dinsm);
 Ip_u1(_syscall);
+Ip_u1u2s3(_bbit0);
+Ip_u1u2s3(_bbit1);
 
 /* Handle labels. */
 struct uasm_label {