mainboard: Format irq_tables.c

Run the command below to format the files `irq_tables.c` of (mostly AMD)
mainboards correctly with GNU indent 2.2.10.

```
$ git grep -l 'if (sum != pirq->checksum) {' | xargs indent -l
```

Fix up the following two checkpatch.pl errors manually.

```
ERROR: that open brace { should be on the previous line
#1219: FILE: src/mainboard/gigabyte/ga_2761gxdk/irq_tables.c:129:
+			uint8_t reg[8] =
+			    { 0x41, 0x42, 0x43, 0x44, 0x60, 0x61, 0x62, 0x63 };

ERROR: that open brace { should be on the previous line
#1221: FILE: src/mainboard/gigabyte/ga_2761gxdk/irq_tables.c:131:
+			uint8_t irq[8] =
+			    { 0x0A, 0X0B, 0X0, 0X0a, 0X0B, 0X05, 0X0, 0X07 };

```

This is needed, so that follow-up commits, fixing checkpatch.pl errors
and warnings, won’t run into conflicts with the git commit hooks, when
for example, spaces instead of tabs are used for indentation.

Change-Id: If254723f3013377fb3b9b08dd5eca6b76730ec4a
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/15932
Tested-by: build bot (Jenkins)
Reviewed-by: Jonathan A. Kollasch <jakllsch@kollasch.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/lippert/toucan-af/irq_tables.c

@@ -13,7 +13,6 @@
  * GNU General Public License for more details.
  */
 
-
 #include <console/console.h>
 #include <device/pci.h>
 #include <string.h>
@@ -21,7 +20,6 @@
 #include <arch/pirq_routing.h>
 #include <cpu/amd/amdfam14.h>
 
-
 static void write_pirq_info(struct irq_info *pirq_info, u8 bus, u8 devfn,
 			    u8 link0, u16 bitmap0, u8 link1, u16 bitmap1,
 			    u8 link2, u16 bitmap2, u8 link3, u16 bitmap3,
@@ -80,19 +78,14 @@ unsigned long write_pirq_routing_table(unsigned long addr)
 	pirq_info = (void *)(&pirq->checksum + 1);
 	slot_num = 0;
 
-
 	/* pci bridge */
 	write_pirq_info(pirq_info, 0, PCI_DEVFN(0x14, 4),
 			0x1, 0xdef8, 0x2, 0xdef8, 0x3, 0xdef8, 0x4, 0xdef8, 0,
 			0);
 	pirq_info++;
 
-
-
 	slot_num++;
 
-
-
 	pirq->size = 32 + 16 * slot_num;
 
 	for (i = 0; i < pirq->size; i++)