arm64/fpsimd: Remove the prototype for sve_flush_cpu_state()

The function sve_flush_cpu_state() has been removed in commit 21cdd7fd
("KVM: arm64: Remove eager host SVE state saving").

So remove the associated prototype in asm/fpsimd.h.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/include/asm/fpsimd.h

@@ -64,7 +64,6 @@ extern void fpsimd_bind_state_to_cpu(struct user_fpsimd_state *state,
 
 extern void fpsimd_flush_task_state(struct task_struct *target);
 extern void fpsimd_flush_cpu_state(void);
-extern void sve_flush_cpu_state(void);
 
 /* Maximum VL that SVE VL-agnostic software can transparently support */
 #define SVE_VL_ARCH_MAX 0x100