MIPS: Get rid of CONFIG_CPU_HAS_LLSC again

Commit f7ade3c ("MIPS: Get rid of
CONFIG_CPU_HAS_LLSC") did what it promised to do. But since then that
macro and its Kconfig symbol popped up again. Get rid of those again.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/4978/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -1493,7 +1493,6 @@ config CPU_XLP
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
-	select CPU_HAS_LLSC
 	select WEAK_ORDERING
 	select WEAK_REORDERING_BEYOND_LLSC
 	select CPU_HAS_PREFETCH

arch/mips/include/asm/mach-sead3/cpu-feature-overrides.h

@@ -28,11 +28,7 @@
 /* #define cpu_has_prefetch	? */
 #define cpu_has_mcheck		1
 /* #define cpu_has_ejtag	? */
-#ifdef CONFIG_CPU_HAS_LLSC
-#define cpu_has_llsc		1
-#else
 #define cpu_has_llsc		0
-#endif
 /* #define cpu_has_vtag_icache	? */
 /* #define cpu_has_dc_aliases	? */
 /* #define cpu_has_ic_fills_f_dc ? */