aarch64: Fix testcase vec-init-22-speed.c [PR116589]

For this testcase, the trunk produces:
```
f_s16:
        fmov    s31, w0
        fmov    s0, w1
```

While the testcase was expecting what was produced in GCC 14:
```
f_s16:
        sxth    w0, w0
        sxth    w1, w1
        fmov    d31, x0
        fmov    d0, x1
```

After r15-1575-gea8061f46a30 the code was:
```
        dup     v31.4h, w0
        dup     v0.4h, w1
```
But when ext-dce was added with r15-1901-g98914f9eba5f19, we get the better code generation now and only fmov's.

Pushed as obvious after running the testcase.

	PR target/116589

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/vec-init-22-speed.c: Update scan for better code gen.

Signed-off-by: Andrew Pinski <[email protected]>

gcc/testsuite/gcc.target/aarch64/vec-init-22-speed.c

@@ -7,6 +7,6 @@
 
 #include "vec-init-22.h"
 
-/* { dg-final { scan-assembler-times {\tfmov\td[0-9]+, x[0-9]+} 2 } } */
+/* { dg-final { scan-assembler-times {\tfmov\ts[0-9]+, w[0-9]+} 2 } } */
 /* { dg-final { scan-assembler-times {\tins\tv[0-9]+\.h\[[1-3]\], w[0-9]+} 6 } } */
 /* { dg-final { scan-assembler {\tzip1\tv[0-9]+\.8h, v[0-9]+\.8h, v[0-9]+\.8h} } } */