uhd: mpm: apply clang-format to all files

Applying formatting changes to all .cpp and .hpp files in the following
directories:
```
find host/examples/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
find host/tests/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
find host/lib/usrp/dboard/neon/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
find host/lib/usrp/dboard/magnesium/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
find host/lib/usrp/device3/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
find host/lib/usrp/mpmd/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
find host/lib/usrp/x300/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
find host/utils/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
find mpm/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
```

Also formatted host/include/, except Cpp03 was used as a the language
standard instead of Cpp11.
```
sed -i 's/ Cpp11/ Cpp03/g' .clang-format
find host/include/ -iname *.hpp -o -iname *.cpp | \
    xargs clang-format -i -style=file
```

Formatting style was designated by the .clang-format file.

1 files changed, 3 insertions, 2 deletions

diff --git a/host/lib/usrp/x300/x300_adc_ctrl.hpp b/host/lib/usrp/x300/x300_adc_ctrl.hpp
index eb29dd28f..106d79eed 100644
--- a/host/lib/usrp/x300/x300_adc_ctrl.hpp
+++ b/host/lib/usrp/x300/x300_adc_ctrl.hpp
@@ -27,9 +27,10 @@ public:
      */
     static sptr make(uhd::spi_iface::sptr iface, const size_t slaveno);
 
-    virtual double set_gain(const double &) = 0;
+    virtual double set_gain(const double&) = 0;
 
-    virtual void set_test_word(const std::string &patterna, const std::string &patternb, const uint32_t = 0) = 0;
+    virtual void set_test_word(
+        const std::string& patterna, const std::string& patternb, const uint32_t = 0) = 0;
 
     virtual void reset(void) = 0;
 };