x86/umip: Print UMIP line only once

mainline inclusion
from mainline-v5.0-rc1
commit 0abbbc63
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7DX6V
CVE: NA

Reference: https://git.kernel.org/torvalds/c/0abbbc63d0251a25d3df6c8a56ab3d3c20af082c



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

commit 0abbbc63 upstream.

... instead of issuing it per CPU and flooding dmesg unnecessarily.
Streamline the formulation, while at it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20181127205936.30331-1-bp@alien8.de


Signed-off-by: Pu Wen <puwen@hygon.cn>