Platform: Add support for Musca-B1 test chip board

Details:
 - Adds Musca-B1 platform support files, which are derived from the
   Musca-A1 platform support files.
 - Adds a new target platform to the build system: "MUSCA_B1"
 - Updates the docs with details for Musca-B1

Change-Id: I58e74357b0aa4174015fd117e2e04b40255a6303
Signed-off-by: Jamie Fox <jamie.fox@arm.com>
diff --git a/ConfigRegression.cmake b/ConfigRegression.cmake
index f0c80da..14b428d 100755
--- a/ConfigRegression.cmake
+++ b/ConfigRegression.cmake
@@ -17,6 +17,8 @@
 	set (PLATFORM_CMAKE_FILE "${CMAKE_CURRENT_LIST_DIR}/platform/ext/Mps2AN519.cmake")
 elseif(${TARGET_PLATFORM} STREQUAL "MUSCA_A")
 	set(PLATFORM_CMAKE_FILE "${CMAKE_CURRENT_LIST_DIR}/platform/ext/musca_a.cmake")
+elseif(${TARGET_PLATFORM} STREQUAL "MUSCA_B1")
+	set(PLATFORM_CMAKE_FILE "${CMAKE_CURRENT_LIST_DIR}/platform/ext/musca_b1.cmake")
 else()
 	message(FATAL_ERROR "ERROR: Target \"${TARGET_PLATFORM}\" is not supported.")
 endif()