src: Add required space after "switch"

Change-Id: I85cf93e30606bc7838852bd300a369e79370629a
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/29623
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/northbridge/intel/x4x/raminit_ddr23.c

@@ -820,7 +820,7 @@ static void program_dll(struct sysinfo *s)
 	FOR_EACH_POPULATED_CHANNEL(s->dimms, i) {
 		const struct dll_setting *setting;
 
-		switch(s->selected_timings.mem_clk) {
+		switch (s->selected_timings.mem_clk) {
 		default: /* Should not happen */
 	        case MEM_CLOCK_667MHz:
 			setting = default_ddr2_667_ctrl;