arm64: Update the synchronous external abort fault description

This patch updates the description of the synchronous external aborts on
translation table walks.

Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/mm/fault.c

@@ -507,10 +507,10 @@ static const struct fault_info {
 	{ do_bad,		SIGBUS,  0,		"unknown 17"			},
 	{ do_bad,		SIGBUS,  0,		"unknown 18"			},
 	{ do_bad,		SIGBUS,  0,		"unknown 19"			},
-	{ do_bad,		SIGBUS,  0,		"synchronous abort (translation table walk)" },
-	{ do_bad,		SIGBUS,  0,		"synchronous abort (translation table walk)" },
-	{ do_bad,		SIGBUS,  0,		"synchronous abort (translation table walk)" },
-	{ do_bad,		SIGBUS,  0,		"synchronous abort (translation table walk)" },
+	{ do_bad,		SIGBUS,  0,		"synchronous external abort (translation table walk)" },
+	{ do_bad,		SIGBUS,  0,		"synchronous external abort (translation table walk)" },
+	{ do_bad,		SIGBUS,  0,		"synchronous external abort (translation table walk)" },
+	{ do_bad,		SIGBUS,  0,		"synchronous external abort (translation table walk)" },
 	{ do_bad,		SIGBUS,  0,		"synchronous parity error"	},
 	{ do_bad,		SIGBUS,  0,		"unknown 25"			},
 	{ do_bad,		SIGBUS,  0,		"unknown 26"			},