x86/platform/uv: Mark uv_min_hub_revision_id static

This variable is only used inside x2apic_uv_x and not even declared
in a header.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Not-acked-by:  Dimitri Sivanich <[email protected]>
Cc: Russ Anderson <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

Author: Christoph Hellwig

arch/x86/kernel/apic/x2apic_uv_x.c

@@ -48,8 +48,7 @@ static struct {
 	unsigned int gnode_shift;
 } uv_cpuid;
 
-int uv_min_hub_revision_id;
-EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);
+static int uv_min_hub_revision_id;
 
 unsigned int uv_apicid_hibits;
 EXPORT_SYMBOL_GPL(uv_apicid_hibits);