sw64: kgdb: add support for sw64

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4SPZD
CVE: NA

-------------------------------

Signed-off-by: Gu Zitao <guzitao@wxiat.com> #openEuler_contributor
Signed-off-by: NLaibin Qiu <qiulaibin@huawei.com>
Reviewed-by: NHanjun Guo <guohanjun@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/misc/kgdbts.c

@@ -129,7 +129,8 @@ static int hw_break_val2;
 static int cont_instead_of_sstep;
 static unsigned long cont_thread_id;
 static unsigned long sstep_thread_id;
-#if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || defined(CONFIG_SPARC)
+#if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || defined(CONFIG_SPARC) \
+	|| defined(CONFIG_SW64)
 static int arch_needs_sstep_emulation = 1;
 #else
 static int arch_needs_sstep_emulation;