x86/platform/uv: Unexport sn_coherency_id

sn_coherency_id is only used by x2apic_uv_x.c, and uv_sysfs.c, both
of which can't be modular.

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/platform/uv/bios_uv.c

@@ -80,7 +80,6 @@ static s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
 long sn_partition_id;
 EXPORT_SYMBOL_GPL(sn_partition_id);
 long sn_coherency_id;
-EXPORT_SYMBOL_GPL(sn_coherency_id);
 long sn_region_size;
 EXPORT_SYMBOL_GPL(sn_region_size);
 long system_serial_number;