ArmPkg: Update code to be more C11 compliant by using __func__

__FUNCTION__ is a pre-standard extension that gcc and Visual C++ among
others support, while __func__ was standardized in C99.

Since it's more standard, replace __FUNCTION__ with __func__ throughout
ArmPkg.

Signed-off-by: Rebecca Cran <rebecca@bsdio.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>

ArmPkg/Drivers/ArmGic/ArmGicCommonDxe.c

@@ -137,7 +137,7 @@ CpuArchEventProtocolNotify (
     DEBUG ((
       DEBUG_ERROR,
       "%a: Cpu->RegisterInterruptHandler() - %r\n",
-      __FUNCTION__,
+      __func__,
       Status
       ));
     return;
@@ -153,7 +153,7 @@ CpuArchEventProtocolNotify (
     DEBUG ((
       DEBUG_ERROR,
       "%a: Cpu->RegisterInterruptHandler() - %r\n",
-      __FUNCTION__,
+      __func__,
       Status
       ));
   }

ArmPkg/Drivers/CpuDxe/MemoryAttribute.c

@@ -92,7 +92,7 @@ GetMemoryAttributes (
   DEBUG ((
     DEBUG_VERBOSE,
     "%a: BaseAddress == 0x%lx, Length == 0x%lx\n",
-    __FUNCTION__,
+    __func__,
     BaseAddress,
     Length
     ));
@@ -113,7 +113,7 @@ GetMemoryAttributes (
     DEBUG ((
       DEBUG_VERBOSE,
       "%a: RegionAddress == 0x%lx, RegionLength == 0x%lx, RegionAttributes == 0x%lx\n",
-      __FUNCTION__,
+      __func__,
       (UINT64)RegionAddress,
       (UINT64)RegionLength,
       (UINT64)RegionAttributes
@@ -130,7 +130,7 @@ GetMemoryAttributes (
   DEBUG ((
     DEBUG_VERBOSE,
     "%a: Union == %lx, Intersection == %lx\n",
-    __FUNCTION__,
+    __func__,
     (UINT64)Union,
     (UINT64)Intersection
     ));
@@ -188,7 +188,7 @@ SetMemoryAttributes (
   DEBUG ((
     DEBUG_INFO,
     "%a: BaseAddress == 0x%lx, Length == 0x%lx, Attributes == 0x%lx\n",
-    __FUNCTION__,
+    __func__,
     (UINTN)BaseAddress,
     (UINTN)Length,
     (UINTN)Attributes
@@ -272,7 +272,7 @@ ClearMemoryAttributes (
   DEBUG ((
     DEBUG_INFO,
     "%a: BaseAddress == 0x%lx, Length == 0x%lx, Attributes == 0x%lx\n",
-    __FUNCTION__,
+    __func__,
     (UINTN)BaseAddress,
     (UINTN)Length,
     (UINTN)Attributes