refactor: move ultrarisc cpu-related code into bsp directory

Author: zhangjing0303

bsp/ultrarisc/arch/ur-cp100/SConscript

@@ -0,0 +1,12 @@
+# RT-Thread building script for component
+
+from building import *
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp')
+CPPPATH = [cwd]
+
+group = DefineGroup('arch', src, depend = [''], CPPPATH = CPPPATH)
+
+objs = [group]
+
+Return('objs')

libcpu/risc-v/ultrarisc/ur-cp100/cache.c bsp/ultrarisc/arch/ur-cp100/cache.clibcpu/risc-v/ultrarisc/ur-cp100/cache.c renamed to bsp/ultrarisc/arch/ur-cp100/cache.c

@@ -49,10 +49,15 @@ if os.path.exists(SDK_ROOT + '/drivers'):
 else:
     drivers_path_prefix = os.path.dirname(SDK_ROOT) + '/drivers'
 
-
+if os.path.exists(SDK_ROOT + '/arch/ur-cp100'):
+    arch_path_prefix = SDK_ROOT + '/arch/ur-cp100'
+else:
+    arch_path_prefix = os.path.dirname(SDK_ROOT) + '/arch/ur-cp100'
 
 # include libraries
 objs.extend(SConscript(drivers_path_prefix + '/SConscript', variant_dir='build/drivers', duplicate=0))
 
+objs.extend(SConscript(arch_path_prefix + '/SConscript', variant_dir='build/arch/ur-cp100', duplicate=0))
+
 # make a building
 DoBuilding(TARGET, objs)