meson: Add spi95.c to fix the build

Reported in issue #105 on github.

Change-Id: Ibe484b4ef60533135fa1e96eb203bb55985d1f8e
Signed-off-by: David Hendricks <david.hendricks@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/35819
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

meson.build

@@ -321,6 +321,7 @@ srcs += 'programmer.c'
 srcs += 'sfdp.c'
 srcs += 'spi25.c'
 srcs += 'spi25_statusreg.c'
+srcs += 'spi95.c'
 srcs += 'spi.c'
 srcs += 'sst28sf040.c'
 srcs += 'sst49lfxxxc.c'