arm64: Provide a namespace to NCAPS

Building arm64.allmodconfig leads to the following warning:

usb/gadget/function/f_ncm.c:203:0: warning: "NCAPS" redefined
 #define NCAPS (USB_CDC_NCM_NCAP_ETH_FILTER | USB_CDC_NCM_NCAP_CRC_MODE)
 ^
In file included from /home/build/work/batch/arch/arm64/include/asm/io.h:32:0,
                 from /home/build/work/batch/include/linux/clocksource.h:19,
                 from /home/build/work/batch/include/clocksource/arm_arch_timer.h:19,
                 from /home/build/work/batch/arch/arm64/include/asm/arch_timer.h:27,
                 from /home/build/work/batch/arch/arm64/include/asm/timex.h:19,
                 from /home/build/work/batch/include/linux/timex.h:65,
                 from /home/build/work/batch/include/linux/sched.h:19,
                 from /home/build/work/batch/arch/arm64/include/asm/compat.h:25,
                 from /home/build/work/batch/arch/arm64/include/asm/stat.h:23,
                 from /home/build/work/batch/include/linux/stat.h:5,
                 from /home/build/work/batch/include/linux/module.h:10,
                 from /home/build/work/batch/drivers/usb/gadget/function/f_ncm.c:19:
arch/arm64/include/asm/cpufeature.h:27:0: note: this is the location of the previous definition
 #define NCAPS     2

So add a ARM64 prefix to avoid such problem.
Reported-by: NOlof's autobuilder <build@lixom.net>
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>

arch/arm64/include/asm/cpufeature.h

@@ -24,11 +24,11 @@
 #define ARM64_WORKAROUND_CLEAN_CACHE		0
 #define ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE	1
 
-#define NCAPS					2
+#define ARM64_NCAPS				2
 
 #ifndef __ASSEMBLY__
 
-extern DECLARE_BITMAP(cpu_hwcaps, NCAPS);
+extern DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS);
 
 static inline bool cpu_have_feature(unsigned int num)
 {
@@ -37,16 +37,16 @@ static inline bool cpu_have_feature(unsigned int num)
 
 static inline bool cpus_have_cap(unsigned int num)
 {
-	if (num >= NCAPS)
+	if (num >= ARM64_NCAPS)
 		return false;
 	return test_bit(num, cpu_hwcaps);
 }
 
 static inline void cpus_set_cap(unsigned int num)
 {
-	if (num >= NCAPS)
+	if (num >= ARM64_NCAPS)
 		pr_warn("Attempt to set an illegal CPU capability (%d >= %d)\n",
-			num, NCAPS);
+			num, ARM64_NCAPS);
 	else
 		__set_bit(num, cpu_hwcaps);
 }

arch/arm64/kernel/setup.c

@@ -80,7 +80,7 @@ unsigned int compat_elf_hwcap __read_mostly = COMPAT_ELF_HWCAP_DEFAULT;
 unsigned int compat_elf_hwcap2 __read_mostly;
 #endif
 
-DECLARE_BITMAP(cpu_hwcaps, NCAPS);
+DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS);
 
 static const char *cpu_name;
 phys_addr_t __fdt_pointer __initdata;