add .clang-format

Add .clang-format for automatic style.

Change-Id: I6d240009370179b5b8f1f646b0476a059ec6aa85
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/p9_cfam.hpp b/p9_cfam.hpp
index 19b6e33..4ffdc6d 100644
--- a/p9_cfam.hpp
+++ b/p9_cfam.hpp
@@ -7,22 +7,22 @@
 namespace p9
 {
 
-static constexpr uint32_t P9_DD10_CHIPID           = 0x120D1049;
+static constexpr uint32_t P9_DD10_CHIPID = 0x120D1049;
 
-static constexpr uint16_t P9_FSI_A_SI1S            = 0x081C;
-static constexpr uint16_t P9_LL_MODE_REG           = 0x0840;
-static constexpr uint16_t P9_FSI2PIB_CHIPID        = 0x100A;
-static constexpr uint16_t P9_FSI2PIB_INTERRUPT     = 0x100B;
-static constexpr uint16_t P9_FSI2PIB_TRUE_MASK     = 0x100D;
-static constexpr uint16_t P9_CBS_CS                = 0x2801;
-static constexpr uint16_t P9_SBE_CTRL_STATUS       = 0x2808;
-static constexpr uint16_t P9_SBE_MSG_REGISTER      = 0x2809;
-static constexpr uint16_t P9_ROOT_CTRL0            = 0x2810;
-static constexpr uint16_t P9_PERV_CTRL0            = 0x281A;
-static constexpr uint16_t P9_HB_MBX5_REG           = 0x283C;
-static constexpr uint16_t P9_SCRATCH_REGISTER_8    = 0x283F;
-static constexpr uint16_t P9_ROOT_CTRL8            = 0x2918;
-static constexpr uint16_t P9_ROOT_CTRL1_CLEAR      = 0x2931;
-}
-}
-}
+static constexpr uint16_t P9_FSI_A_SI1S = 0x081C;
+static constexpr uint16_t P9_LL_MODE_REG = 0x0840;
+static constexpr uint16_t P9_FSI2PIB_CHIPID = 0x100A;
+static constexpr uint16_t P9_FSI2PIB_INTERRUPT = 0x100B;
+static constexpr uint16_t P9_FSI2PIB_TRUE_MASK = 0x100D;
+static constexpr uint16_t P9_CBS_CS = 0x2801;
+static constexpr uint16_t P9_SBE_CTRL_STATUS = 0x2808;
+static constexpr uint16_t P9_SBE_MSG_REGISTER = 0x2809;
+static constexpr uint16_t P9_ROOT_CTRL0 = 0x2810;
+static constexpr uint16_t P9_PERV_CTRL0 = 0x281A;
+static constexpr uint16_t P9_HB_MBX5_REG = 0x283C;
+static constexpr uint16_t P9_SCRATCH_REGISTER_8 = 0x283F;
+static constexpr uint16_t P9_ROOT_CTRL8 = 0x2918;
+static constexpr uint16_t P9_ROOT_CTRL1_CLEAR = 0x2931;
+} // namespace p9
+} // namespace cfam
+} // namespace openpower