fix: Don't shift BASEPTR0

BASEPTR0's field only needs masking of its lower bits.

Author: ithinuel

pyocd/coresight/dap.py

@@ -498,7 +498,7 @@ def _check_version(self) -> None:
             baseptr0 = self.read_reg(DP_BASEPTR0)
             valid = (baseptr0 & BASEPTR0_VALID_MASK) != 0
             if valid:
-                base = (baseptr0 & BASEPTR0_PTR_MASK) >> BASEPTR0_PTR_SHIFT
+                base = baseptr0 & BASEPTR0_PTR_MASK
                 if self._addr_size > 32:
                     baseptr1 = self.read_reg(DP_BASEPTR1)
                     base |= baseptr1 << 32