soc/intel/broadwell: Fix {}, () and conditional issues

Fix the following errors and warnings detected by checkpatch:

ERROR: open brace '{' following struct go on the same line
ERROR: return is not a function, parentheses are not required
ERROR: do not use assignment in if condition
ERROR: trailing statements should be on next line
WARNING: else is not generally useful after a break or return
WARNING: braces {} are not necessary for single statement blocks
WARNING: braces {} are not necessary for any arm of this statement

TEST=None

Change-Id: I9414341b0c778c252db33f0ef4847b9530681d96
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18884
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)

src/soc/intel/broadwell/igd.c

@@ -530,11 +530,10 @@ static void igd_init(struct device *dev)
 
 	/* Late init steps */
 	igd_cdclk_init(dev, is_broadwell);
-	if (is_broadwell) {
+	if (is_broadwell)
 		reg_script_run_on_dev(dev, broadwell_late_init_script);
-	} else {
+	else
 		reg_script_run_on_dev(dev, haswell_late_init_script);
-	}
 
 	if (gfx_get_init_done()) {
 		/*