use vfp mnemonics instead of p10 coprocessor ones in armhf fenv asm

mrc/mcr p10 coprocessor mnemonics are deprecated by some
toolchains.

src/fenv/armhf/fenv.s

@@ -3,17 +3,17 @@
 .global fegetround
 .type fegetround,%function
 fegetround:
-	mrc p10, 7, r0, cr1, cr0, 0
+	fmrx r0, fpscr
 	and r0, r0, #0xc00000
 	bx lr
 
 .global __fesetround
 .type __fesetround,%function
 __fesetround:
-	mrc p10, 7, r3, cr1, cr0, 0
+	fmrx r3, fpscr
 	bic r3, r3, #0xc00000
 	orr r3, r3, r0
-	mcr p10, 7, r3, cr1, cr0, 0
+	fmxr fpscr, r3
 	mov r0, #0
 	bx lr
 
@@ -21,7 +21,7 @@ __fesetround:
 .type fetestexcept,%function
 fetestexcept:
 	and r0, r0, #0x1f
-	mrc p10, 7, r3, cr1, cr0, 0
+	fmrx r3, fpscr
 	and r0, r0, r3
 	bx lr
 
@@ -29,9 +29,9 @@ fetestexcept:
 .type feclearexcept,%function
 feclearexcept:
 	and r0, r0, #0x1f
-	mrc p10, 7, r3, cr1, cr0, 0
+	fmrx r3, fpscr
 	bic r3, r3, r0
-	mcr p10, 7, r3, cr1, cr0, 0
+	fmxr fpscr, r3
 	mov r0, #0
 	bx lr
 
@@ -39,16 +39,16 @@ feclearexcept:
 .type feraiseexcept,%function
 feraiseexcept:
 	and r0, r0, #0x1f
-	mrc p10, 7, r3, cr1, cr0, 0
+	fmrx r3, fpscr
 	orr r3, r3, r0
-	mcr p10, 7, r3, cr1, cr0, 0
+	fmxr fpscr, r3
 	mov r0, #0
 	bx lr
 
 .global fegetenv
 .type fegetenv,%function
 fegetenv:
-	mrc p10, 7, r3, cr1, cr0, 0
+	fmrx r3, fpscr
 	str r3, [r0]
 	mov r0, #0
 	bx lr
@@ -59,6 +59,6 @@ fesetenv:
 	cmn r0, #1
 	moveq r3, #0
 	ldrne r3, [r0]
-	mcr p10, 7, r3, cr1, cr0, 0
+	fmxr fpscr, r3
 	mov r0, #0
 	bx lr