x86/fpu: Fix inline prefix warnings

Fix sparse warnings in xstate and remove inline prefix.

Fixes: 980fe2fd ("x86/fpu: Extend fpu_xstate_prctl() with guest permissions")
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Message-Id: <20220113180825.322333-1-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/include/asm/fpu/api.h

@@ -132,7 +132,7 @@ static inline void fpstate_free(struct fpu *fpu) { }
 /* fpstate-related functions which are exported to KVM */
 extern void fpstate_clear_xstate_component(struct fpstate *fps, unsigned int xfeature);
 
-extern inline u64 xstate_get_guest_group_perm(void);
+extern u64 xstate_get_guest_group_perm(void);
 
 /* KVM specific functions */
 extern bool fpu_alloc_guest_fpstate(struct fpu_guest *gfpu);

arch/x86/kernel/fpu/xstate.c

@@ -1744,7 +1744,7 @@ static inline int xstate_request_perm(unsigned long idx, bool guest)
 }
 #endif  /* !CONFIG_X86_64 */
 
-inline u64 xstate_get_guest_group_perm(void)
+u64 xstate_get_guest_group_perm(void)
 {
 	return xstate_get_group_perm(true);
 }