patch 9.1.0873: filetype: Vivado files are not recognized

Problem:  filetype: Vivado files are not recognized
Solution: detect '*.mss' files as 'mss' filetype
          (Wu, Zhenyu)

references:
https://docs.amd.com/r/2020.2-English/ug1400-vitis-embedded/Microprocessor-Software-Specification-MSS

closes: #15907

Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/mss.vim b/runtime/syntax/mss.vim
new file mode 100644
index 0000000..de95d1d
--- /dev/null
+++ b/runtime/syntax/mss.vim
@@ -0,0 +1,23 @@
+" Vim syntax file
+" Language:	Vivado mss file
+" Maintainer:	The Vim Project <https://github.com/vim/vim>
+" Last Change:	2024 Oct 22
+" Document:	https://docs.amd.com/r/2020.2-English/ug1400-vitis-embedded/Microprocessor-Software-Specification-MSS
+" Maintainer:	Wu, Zhenyu <wuzhenyu@ustc.edu>
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syn case ignore
+syn match	mssComment	"#.*$" contains=@Spell
+syn keyword	mssKeyword	BEGIN END PARAMETER
+syn keyword	mssType		OS PROCESSOR DRIVER LIBRARY
+syn keyword	mssConstant	VERSION PROC_INSTANCE HW_INSTANCE OS_NAME OS_VER DRIVER_NAME DRIVER_VER LIBRARY_NAME LIBRARY_VER STDIN STDOUT XMDSTUB_PERIPHERAL ARCHIVER COMPILER COMPILER_FLAGS EXTRA_COMPILER_FLAGS
+
+hi def link mssComment		Comment
+hi def link mssKeyword		Keyword
+hi def link mssType		Type
+hi def link mssConstant		Constant
+
+let b:current_syntax = "mss"