[gcc r13-1202] RISC-V: Add -mtune=thead-c906 to the invoke docs

[gcc r13-1202] RISC-V: Add -mtune=thead-c906 to the invoke docs

[Palmer Dabbelt]

https://gcc.gnu.org/g:98b6e62cf5e7d477b5797084da59561f6d018668

commit r13-1202-g98b6e62cf5e7d477b5797084da59561f6d018668
Author: Palmer Dabbelt <palmer@rivosinc.com>
Date:   Wed May 25 19:30:55 2022 -0700

    RISC-V: Add -mtune=thead-c906 to the invoke docs
    
    gcc/ChangeLog
    
            * doc/invoke.texi (RISC-V): Document -mtune=thead-c906.

Diff:
---
 gcc/doc/invoke.texi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 81d13f4e78e..fb506364702 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -28164,7 +28164,7 @@ Permissible values for this option are: @samp{sifive-e20}, @samp{sifive-e21},
 Optimize the output for the given processor, specified by microarchitecture or
 particular CPU name.  Permissible values for this option are: @samp{rocket},
 @samp{sifive-3-series}, @samp{sifive-5-series}, @samp{sifive-7-series},
-@samp{size}, and all valid options for @option{-mcpu=}.
+@samp{thead-c906}, @samp{size}, and all valid options for @option{-mcpu=}.
 
 When @option{-mtune=} is not specified, use the setting from @option{-mcpu},
 the default is @samp{rocket} if both are not specified.