arch-arm: Remove unused float operands

Removing FaP1 and FDest2 since they are not currently used by any ARM
instruction.

Change-Id: I4251dfcdd3f4434caaf0bdab507c1c3bd53fb5d2
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/15596
Reviewed-by: Ciro Santilli <ciro.santilli@gmail.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

src/arch/arm/isa/operands.isa

@@ -192,7 +192,6 @@ def operands {{
     'AIWDest': intRegAIWPC('dest'),
     'Dest2': intReg('dest2'),
     'XDest2': intRegX64('dest2'),
-    'FDest2': floatReg('dest2'),
     'IWDest2': intRegIWPC('dest2'),
     'Result': intReg('result'),
     'XResult': intRegX64('result'),
@@ -550,7 +549,6 @@ def operands {{
     'WURa' : intRegW64('ura'),
     'IWRa' : intRegIWPC('ura'),
     'Fa' : floatReg('ura'),
-    'FaP1' : floatReg('ura + 1'),
     'URb' : intReg('urb'),
     'XURb' : intRegX64('urb'),
     'URc' : intReg('urc'),