toolchain/ghs: Fix green hills toolchain build Vela asarm errors
common/gnu/fork.S 29: unknown instruction
.syntax unified
--^
[asarm] (error #2230) common/gnu/fork.S 81: bad directive
.type up_fork , function
------------------^
[asarm] (error #2067) armv7-m/arm_saveusercontext.S 31: unknown instruction
.syntax unified
--^
[asarm] (error #2230) armv7-m/arm_saveusercontext.S 55: bad directive
.type up_saveusercontext , % function
--^
[asarm] (error #2004) armv7-m/arm_saveusercontext.S 65: not within valid register range
str r12 , [ r0 , ( 4 * ( ( ( 12 ) + ( 16 ) ) + 4 ) ) ]
------^
[asarm] (error #2004) armv7-m/arm_saveusercontext.S 66: not within valid register range
str r14 , [ r0 , ( 4 * ( ( ( 12 ) + ( 16 ) ) + 5 ) ) ]
------^
[asarm] (error #2004) armv7-m/arm_saveusercontext.S 67: not within valid register range
str r14 , [ r0 , ( 4 * ( ( ( 12 ) + ( 16 ) ) + 6 ) ) ]
------^
[asarm] (error #2014) armv7-m/arm_saveusercontext.S 72: expected a register
str r1 , [ r0 , ( 4 * ( ( ( 12 ) + ( 16 ) ) + 7 ) ) ]
------------------^
[asarm] (error #2004) armv7-m/arm_saveusercontext.S 75: not within valid register range
add r1 , r0 , ( 4 * ( ( ( 12 ) + ( 16 ) ) + 8 ) )
-----------^
[asarm] (error #2071) armv7-m/arm_saveusercontext.S 89: bad parameter
stmia r0 ! , { r2 - r11 }
--------^
[asarm] (error #2014) armv7-m/arm_saveusercontext.S 93: expected a register
mov r1 , - 1
-----------^
Signed-off-by: yanghuatao <yanghuatao@xiaomi.com>