target-arm: rename c1_coproc to cpacr_el1

Rename the field holding CPACR_EL1 system register state in AArch64
naming style.

Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
[PMM: also fixed a couple of missed occurrences in cpu.c]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 083211c..d63d9b2 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -201,7 +201,7 @@
             };
             uint64_t sctlr_el[4];
         };
-        uint64_t c1_coproc; /* Coprocessor access register.  */
+        uint64_t cpacr_el1; /* Architectural feature access control register */
         uint32_t c1_xscaleauxcr; /* XScale auxiliary control register.  */
         uint64_t sder; /* Secure debug enable register. */
         uint32_t nsacr; /* Non-secure access control register. */
@@ -1813,7 +1813,7 @@
     int fpen;
 
     if (arm_feature(env, ARM_FEATURE_V6)) {
-        fpen = extract32(env->cp15.c1_coproc, 20, 2);
+        fpen = extract32(env->cp15.cpacr_el1, 20, 2);
     } else {
         /* CPACR doesn't exist before v6, so VFP is always accessible */
         fpen = 3;