LoongArch: Rename GCC_PLUGIN_STACKLEAK to KSTACK_ERASE

Commit 57fbad1 ("stackleak: Rename STACKLEAK to KSTACK_ERASE")
misses the stackframe.h part for LoongArch, so fix it.

Fixes: 57fbad1 ("stackleak: Rename STACKLEAK to KSTACK_ERASE")
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Author: chenhuacai

arch/loongarch/include/asm/stackframe.h

@@ -58,7 +58,7 @@
 	.endm
 
 	.macro STACKLEAK_ERASE
-#ifdef CONFIG_GCC_PLUGIN_STACKLEAK
+#ifdef CONFIG_KSTACK_ERASE
 	bl	stackleak_erase_on_task_stack
 #endif
 	.endm