debug: thread_info: Store thread stack pointer offset for OpenRISC

In OpenRISC 1000, the stack pointer is stored in the r1 register. This
patch stores the offset of this value within in the thread structure into
the thread info offsets.

Signed-off-by: Joel Holdsworth <jholdsworth@nvidia.com>

Author: jhol

subsys/debug/thread_info.c

@@ -74,6 +74,9 @@ const size_t _kernel_thread_info_offsets[] = {
 #elif defined(CONFIG_MIPS)
 	[THREAD_INFO_OFFSET_T_STACK_PTR] = offsetof(struct k_thread,
 						callee_saved.sp),
+#elif defined(CONFIG_OPENRISC)
+	[THREAD_INFO_OFFSET_T_STACK_PTR] = offsetof(struct k_thread,
+						callee_saved.r1),
 #elif defined(CONFIG_NIOS2)
 	[THREAD_INFO_OFFSET_T_STACK_PTR] = offsetof(struct k_thread,
 						callee_saved.sp),