arm64: Update setup_arch() comment on interrupt masking

DAIF_PROCCTX_NOIRQ contains the FIQ bit. Update the comment as only
asynchronous aborts are unmasked and FIQ is still masked.

Signed-off-by: Ryo Takakura <takakura@valinux.co.jp>
Link: https://lore.kernel.org/r/20240228022836.1756-1-takakura@valinux.co.jp
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Author: ryotakakura98

arch/arm64/kernel/setup.c

@@ -320,9 +320,8 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p)
 	dynamic_scs_init();
 
 	/*
-	 * Unmask asynchronous aborts and fiq after bringing up possible
-	 * earlycon. (Report possible System Errors once we can report this
-	 * occurred).
+	 * Unmask SError as soon as possible after initializing earlycon so
+	 * that we can report any SErrors immediately.
 	 */
 	local_daif_restore(DAIF_PROCCTX_NOIRQ);