arm64: Fix misspellings in comments.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/include/asm/ftrace.h b/arch/arm64/include/asm/ftrace.h
index 3c60f37..caa955f 100644
--- a/arch/arm64/include/asm/ftrace.h
+++ b/arch/arm64/include/asm/ftrace.h
@@ -48,7 +48,7 @@
  * See kernel/trace/trace_syscalls.c
  *
  * x86 code says:
- * If the user realy wants these, then they should use the
+ * If the user really wants these, then they should use the
  * raw syscall tracepoints with filtering.
  */
 #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS