hw/pl022: Use LOG_UNIMP and LOG_GUEST_ERROR

Use LOG_UNIMP and LOG_GUEST_ERROR where appropriate rather
than hw_error().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

hw/pl022.c

diff --git a/hw/pl022.c b/hw/pl022.c
index 60e35da..e2ae315 100644
--- a/hw/pl022.c
+++ b/hw/pl022.c
@@ -168,7 +168,8 @@
         /* Not implemented.  */
         return 0;
     default:
-        hw_error("pl022_read: Bad offset %x\n", (int)offset);
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "pl022_read: Bad offset %x\n", (int)offset);
         return 0;
     }
 }
@@ -211,11 +212,12 @@
         break;
     case 0x20: /* DMACR */
         if (value) {
-            hw_error("pl022: DMA not implemented\n");
+            qemu_log_mask(LOG_UNIMP, "pl022: DMA not implemented\n");
         }
         break;
     default:
-        hw_error("pl022_write: Bad offset %x\n", (int)offset);
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "pl022_write: Bad offset %x\n", (int)offset);
     }
 }