vim:uboot: add support for cpp comments

Signed-off-by: Alejandro Mery <amery@geeks.cl>

files/.vim/syntax/uboot.vim

@@ -3,13 +3,28 @@ if exists("b:current_syntax")
 	finish
 endif
 
+if !exists("u_boot_highlight_cpp")
+	let u_boot_highlight_cpp = 1
+endif
+
 " case sensitive
 syn case match
 
-syn match scrComment "^[ \t]*#.*$"
 syn match scrProperty "\${[a-z\.]\+}"
 
-hi link scrComment Comment
+if u_boot_highlight_cpp != 0
+	syn match cppHash "^[ \t]*#.*$"
+	syn match cppLineComment "\/\/.*"
+	syn region cppComment	start="/\*" end="\*/"
+
+	hi link cppHash PreProc
+	hi link cppLineComment Comment
+	hi link cppComment Comment
+else
+	syn match scrComment "^[ \t]*#.*$"
+	hi link scrComment Comment
+endif
+
 hi link scrProperty Identifier
 
 let b:current_syntax = "uboot"