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)
diff --git a/src/soc/intel/broadwell/lpc.c b/src/soc/intel/broadwell/lpc.c
index 8de38be..dadbaff 100644
--- a/src/soc/intel/broadwell/lpc.c
+++ b/src/soc/intel/broadwell/lpc.c
@@ -114,10 +114,18 @@
 		int_pin = pci_read_config8(irq_dev, PCI_INTERRUPT_PIN);
 
 		switch (int_pin) {
-		case 1: /* INTA# */ int_line = config->pirqa_routing; break;
-		case 2: /* INTB# */ int_line = config->pirqb_routing; break;
-		case 3: /* INTC# */ int_line = config->pirqc_routing; break;
-		case 4: /* INTD# */ int_line = config->pirqd_routing; break;
+		case 1: /* INTA# */
+			int_line = config->pirqa_routing;
+			break;
+		case 2: /* INTB# */
+			int_line = config->pirqb_routing;
+			break;
+		case 3: /* INTC# */
+			int_line = config->pirqc_routing;
+			break;
+		case 4: /* INTD# */
+			int_line = config->pirqd_routing;
+			break;
 		}
 
 		if (!int_line)