riscv: Fixup compile error for previous commit

openEuler inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5QM0N
CVE: NA

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Include vmalloc.h to fix up undefined symbol __vmalloc_node_range
Signed-off-by: NLiao Chang <liaochang1@huawei.com>

arch/riscv/kernel/probes/kprobes.c

@@ -6,6 +6,7 @@
 #include <linux/stop_machine.h>
 #include <asm/ptrace.h>
 #include <linux/uaccess.h>
+#include <linux/vmalloc.h>
 #include <asm/sections.h>
 #include <asm/cacheflush.h>
 #include <asm/bug.h>