Fix minor 85xx warnings

Some patches had inserted warnings into the build:
* mpc8560ads declared data without using it
* cpu_init declared ecm and immap without using it in all CONFIGs
* MPC8548CDS.h had its default filenames changed so that they contained
  "\m" in the paths.  Made the defaults not Windows-specific (or
  anything-specific)

Signed-off-by: Andy Fleming <afleming@freescale.com>

board/mpc8560ads/mpc8560ads.c

@@ -554,7 +554,6 @@ ft_soc_setup(void *blob, bd_t *bd)
 {
 	u32 *p;
 	int len;
-	ulong data;
 
 	p = ft_get_prop(blob, "/" OF_SOC "/cpm@e0000000/brg-frequency", &len);
 

cpu/mpc85xx/cpu_init.c

@@ -194,10 +194,12 @@ void cpu_init_f (void)
 
 int cpu_init_r(void)
 {
+#if defined(CONFIG_CLEAR_LAW0) || defined(CONFIG_L2_CACHE)
 	volatile immap_t    *immap = (immap_t *)CFG_IMMR;
+#endif
+#ifdef CONFIG_CLEAR_LAW0
 	volatile ccsr_local_ecm_t *ecm = &immap->im_local_ecm;
 
-#ifdef CONFIG_CLEAR_LAW0
 	/* clear alternate boot location LAW (used for sdram, or ddr bank) */
 	ecm->lawar0 = 0;
 #endif

include/configs/MPC8548CDS.h

@@ -623,6 +623,7 @@ extern unsigned long get_clock_freq(void);
 #define ENET_ENV ""
 #endif
 
+#if 0
 #define	CONFIG_EXTRA_ENV_SETTINGS				\
  "netdev=eth0\0"						\
  "uboot=" MK_STR(CONFIG_UBOOTPATH) "\0"				\
@@ -634,9 +635,9 @@ extern unsigned long get_clock_freq(void);
 	"cmp.b $loadaddr " MK_STR(TEXT_BASE) " $filesize\0"	\
  "consoledev=ttyS1\0"				\
  "ramdiskaddr=2000000\0"			\
- "ramdiskfile=mpc8548cds\ramdisk.uboot\0"	\
+ "ramdiskfile=ramdisk.uboot\0"			\
  "dtbaddr=c00000\0"				\
- "dtbfile=mpc8548cds\mpc8548cds.dtb\0"		\
+ "dtbfile=mpc8548cds.dtb\0"			\
  "eoi=mw e00400b0 0\0"				\
  "iack=md e00400a0 1\0"				\
  "ddrreg=md ${a}000 8; md ${a}080 8;md ${a}100 d; md ${a}140 4; md ${a}bf0 4;" \
@@ -658,6 +659,7 @@ extern unsigned long get_clock_freq(void);
  PCI_ENV1 \
  PCI_ENV2 \
  ENET_ENV
+#endif
 
 
 #define CONFIG_NFSBOOTCOMMAND						\