MIPS: Fix MSA assembly warnings

Building an MSA capable kernel with a toolchain that supports MSA
produces warnings such as this:

arch/mips/kernel/r4k_fpu.S:229: Warning: the `msa' extension requires 64-bit FPRs

This is due to ".set msa" without ".set fp=64" in the non doubleword MSA
load/store macros, since MSA requires the 64-bit FPU registers (FR=1).
Add the missing fp=64 in these macros to silence the warnings.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13063/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/asmmacro.h

@@ -235,6 +235,7 @@
 	.macro	ld_b	wd, off, base
 	.set	push
 	.set	mips32r2
+	.set	fp=64
 	.set	msa
 	ld.b	$w\wd, \off(\base)
 	.set	pop
@@ -243,6 +244,7 @@
 	.macro	ld_h	wd, off, base
 	.set	push
 	.set	mips32r2
+	.set	fp=64
 	.set	msa
 	ld.h	$w\wd, \off(\base)
 	.set	pop
@@ -251,6 +253,7 @@
 	.macro	ld_w	wd, off, base
 	.set	push
 	.set	mips32r2
+	.set	fp=64
 	.set	msa
 	ld.w	$w\wd, \off(\base)
 	.set	pop
@@ -268,6 +271,7 @@
 	.macro	st_b	wd, off, base
 	.set	push
 	.set	mips32r2
+	.set	fp=64
 	.set	msa
 	st.b	$w\wd, \off(\base)
 	.set	pop
@@ -276,6 +280,7 @@
 	.macro	st_h	wd, off, base
 	.set	push
 	.set	mips32r2
+	.set	fp=64
 	.set	msa
 	st.h	$w\wd, \off(\base)
 	.set	pop
@@ -284,6 +289,7 @@
 	.macro	st_w	wd, off, base
 	.set	push
 	.set	mips32r2
+	.set	fp=64
 	.set	msa
 	st.w	$w\wd, \off(\base)
 	.set	pop