Portable refactorings.

Separate quick from portable entrypoints.
Move architectural dependencies into arch.

Change-Id: I9adbc0a9782e2959fdc3308215f01e3107632b7c
diff --git a/compiler/utils/arm/assembler_arm.cc b/compiler/utils/arm/assembler_arm.cc
index 0778cd3..fa202c3 100644
--- a/compiler/utils/arm/assembler_arm.cc
+++ b/compiler/utils/arm/assembler_arm.cc
@@ -1884,7 +1884,7 @@
   // Don't care about preserving R0 as this call won't return
   __ mov(R0, ShifterOperand(scratch_.AsCoreRegister()));
   // Set up call to Thread::Current()->pDeliverException
-  __ LoadFromOffset(kLoadWord, R12, TR, ENTRYPOINT_OFFSET(pDeliverException));
+  __ LoadFromOffset(kLoadWord, R12, TR, QUICK_ENTRYPOINT_OFFSET(pDeliverException));
   __ blx(R12);
   // Call never returns
   __ bkpt(0);