AMD Mainboards - platform_cfg.h: Fixes for doxygen

- Move @def BIOS_SIZE description to the next line
- SB_GEN2 changed to SB_GPP_GEN2
- Move the SIO_HWM_BASE_ADDRESS description to the next line

Change-Id: Ia3496b0108484f557627304553461932a100dfa5
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/8071
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
diff --git a/src/mainboard/avalue/eax-785e/platform_cfg.h b/src/mainboard/avalue/eax-785e/platform_cfg.h
index 6944ab2..25574b7 100644
--- a/src/mainboard/avalue/eax-785e/platform_cfg.h
+++ b/src/mainboard/avalue/eax-785e/platform_cfg.h
@@ -22,7 +22,8 @@
 #define _PLATFORM_CFG_H_
 
 /**
- * @def BIOS_SIZE -> BIOS_SIZE_{1,2,4,8,16}M
+ * @def BIOS_SIZE
+ *      BIOS_SIZE_{1,2,4,8,16}M
  *
  * In SB800, default ROM size is 1M Bytes, if your platform ROM
  * bigger than 1M you have to set the ROM size outside CIMx module and
@@ -191,7 +192,7 @@
 #define NB_SB_GEN2			TRUE
 
 /**
- * @def SB_GEN2
+ * @def SB_GPP_GEN2
  *    0  - Disable
  *    1  - Enable
  */
@@ -212,7 +213,8 @@
 #define GEC_CONFIG			0
 
 /**
- * @def SIO_HWM_BASE_ADDRESS  Super IO HWM base address
+ * @def SIO_HWM_BASE_ADDRESS
+ *   Super IO HWM base address
  */
 #define SIO_HWM_BASE_ADDRESS		0x290