[ARM] Remove FP work-arounds.

We used to have code to allow binaries linked against glibc to run,
when glibc itself contained some FP instructions (for PCS stack
frames for functions like printf and scanf) thereby allowing FP
emulators like nwfpe to be built as modules.

This has proved to be unreliable with later compilers, so support
for this was dropped a while ago.  Since no one complained, we can
finally remove the dead code.

(NB. a klibc based module-init-tools shouldn't suffer from this
problem.)

arch/arm/kernel/entry-armv.S

@@ -673,48 +673,6 @@ __und_invalid:	sub	sp, sp, #S_FRAME_SIZE
 		and	r2, r6, #31			@ int mode
 		b	bad_mode
 
-#if 1 /* defined CONFIG_FPE_NWFPE || defined CONFIG_FPE_FASTFPE */
-		/* The FPE is always present */
-		.equ	fpe_not_present, fpundefinstr
-#else
-wfs_mask_data:	.word	0x0e200110			@ WFS/RFS
-		.word	0x0fef0fff
-		.word	0x0d000100			@ LDF [sp]/STF [sp]
-		.word	0x0d000100			@ LDF [fp]/STF [fp]
-		.word	0x0f000f00
-
-/* We get here if an undefined instruction happens and the floating
- * point emulator is not present.  If the offending instruction was
- * a WFS, we just perform a normal return as if we had emulated the
- * operation.  This is a hack to allow some basic userland binaries
- * to run so that the emulator module proper can be loaded. --philb
- */
-fpe_not_present:
-		adr	r10, wfs_mask_data
-		ldmia	r10, {r4, r5, r6, r7, r8}
-		ldr	r10, [sp, #S_PC]		@ Load PC
-		sub	r10, r10, #4
-		mask_pc	r10, r10
-		ldrt	r10, [r10]			@ get instruction
-		and	r5, r10, r5
-		teq	r5, r4				@ Is it WFS?
-		moveq	pc, r9
-		and	r5, r10, r8
-		teq	r5, r6				@ Is it LDF/STF on sp or fp?
-		teqne	r5, r7
-		movne	pc, lr
-		tst	r10, #0x00200000		@ Does it have WB
-		moveq	pc, r9
-		and	r4, r10, #255			@ get offset
-		and	r6, r10, #0x000f0000
-		tst	r10, #0x00800000		@ +/-
-		ldr	r5, [sp, r6, lsr #14]		@ Load reg
-		rsbeq	r4, r4, #0
-		add	r5, r5, r4, lsl #2
-		str	r5, [sp, r6, lsr #14]		@ Save reg
-		mov	pc, r9
-#endif
-
 /*
  * SVC mode handlers
  */
@@ -1014,7 +972,7 @@ do_fpe:		ldr	r4, .LCfp
 
 		.data
 ENTRY(fp_enter)
-		.word	fpe_not_present
+		.word	fpundefinstr
 		.text
 
 fpundefinstr:	mov	r0, sp