RTEMS: Add __tls_get_addr() to crt0

Add __tls_get_addr() for all targets to crt0.  This is not only used on
ARM.  In particular, it is used on RISC-V.  This helps to adequately
support the GCC libgomp.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de

newlib/libc/sys/rtems/crt0.c

@@ -198,9 +198,10 @@ RTEMS_STUB(void, __assert_func(const char *file, int line, const char *failedexp
 
 #if defined(__arm__)
 RTEMS_STUB(void, __aeabi_read_tp(void), { })
-RTEMS_STUB(void *, __tls_get_addr(const void *ti), { })
 #endif
 
+RTEMS_STUB(void *, __tls_get_addr(const void *ti), { })
+
 /* The PowerPC expects certain symbols to be defined in the linker script. */
 
 #if defined(__PPC__)