Refactoring: use generic reloc constants

Change-Id: I94dd6256b1b4509b6ea696a3aff17a3991529468
diff --git a/linker/linker.cpp b/linker/linker.cpp
index e0fec0f..7f1ffa9 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -1320,29 +1320,25 @@
          */
 
         switch (type) {
+          case R_GENERIC_JUMP_SLOT:
+          case R_GENERIC_GLOB_DAT:
+          case R_GENERIC_RELATIVE:
+          case R_GENERIC_IRELATIVE:
 #if defined(__aarch64__)
-          case R_AARCH64_JUMP_SLOT:
-          case R_AARCH64_GLOB_DAT:
           case R_AARCH64_ABS64:
           case R_AARCH64_ABS32:
           case R_AARCH64_ABS16:
-          case R_AARCH64_RELATIVE:
-          case R_AARCH64_IRELATIVE:
+#elif defined(__x86_64__)
+          case R_X86_64_32:
+          case R_X86_64_64:
+#endif
             /*
              * The sym_addr was initialized to be zero above, or the relocation
              * code below does not care about value of sym_addr.
              * No need to do anything.
              */
             break;
-#elif defined(__x86_64__)
-          case R_X86_64_JUMP_SLOT:
-          case R_X86_64_GLOB_DAT:
-          case R_X86_64_32:
-          case R_X86_64_64:
-          case R_X86_64_RELATIVE:
-          case R_X86_64_IRELATIVE:
-            // No need to do anything.
-            break;
+#if defined(__x86_64__)
           case R_X86_64_PC32:
             sym_addr = reloc;
             break;
@@ -1591,11 +1587,6 @@
             sym_addr = reloc;
             break;
 #endif
-
-#if defined(__arm__)
-          case R_ARM_COPY:
-            // Fall through. Can't really copy if weak symbol is not found at run-time.
-#endif
           default:
             DL_ERR("unknown weak reloc type %d @ %p (%zu)", type, rel, idx);
             return -1;