arm64: assembler: remove inherit_daif macro

We haven't needed the inherit_daif macro since commit:

  ed3768db ("arm64: entry: convert el1_sync to C")

... which converted all callers to C and the local_daif_inherit
function.

Remove the unused macro.
Signed-off-by: NMark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: NWill Deacon <will@kernel.org>

arch/arm64/include/asm/assembler.h

@@ -40,12 +40,6 @@
 	msr	daif, \flags
 	.endm
 
-	/* Only on aarch64 pstate, PSR_D_BIT is different for aarch32 */
-	.macro	inherit_daif, pstate:req, tmp:req
-	and	\tmp, \pstate, #(PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT)
-	msr	daif, \tmp
-	.endm
-
 	/* IRQ is the lowest priority flag, unconditionally unmask the rest. */
 	.macro enable_da_f
 	msr	daifclr, #(8 | 4 | 1)