sh: Fix __SH_SYSCALL_TRAP_BASE for SH2A architecture

Signed-off-by: Peter Griffin <pgriffin@mpc-data.co.uk>

libc/sysdeps/linux/sh/bits/syscalls.h

@@ -5,7 +5,7 @@
 #endif
 
 /* The Linux kernel uses different trap numbers on sh-2.  */
-#ifdef __CONFIG_SH2__
+#ifdef __CONFIG_SH2__ | __CONFIG_SH2A__
 # define __SH_SYSCALL_TRAP_BASE 0x20
 #else
 # define __SH_SYSCALL_TRAP_BASE 0x10