MIPS: PowerTV: Remove unused ptv_memsize

Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/799/
Reviewed-by: David VomLehn <dvomlehn@cisco.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/powertv/memory.c

@@ -42,8 +42,6 @@
 #define BOOT_MEM_SIZE		KIBIBYTE(256)	/* Memory reserved for bldr */
 #define PHYS_MEM_START		0x10000000	/* Start of physical memory */
 
-unsigned long ptv_memsize;
-
 char __initdata cmdline[COMMAND_LINE_SIZE];
 
 void __init prom_meminit(void)
@@ -87,9 +85,6 @@ void __init prom_meminit(void)
 		}
 	}
 
-	/* Store memsize for diagnostic purposes */
-	ptv_memsize = memsize;
-
 	physend = PFN_ALIGN(&_end) - 0x80000000;
 	if (memsize > LOW_MEM_MAX) {
 		low_mem = LOW_MEM_MAX;