x86/mtrr: Drop unnecessary export of "mtrr_state"

Don't export "mtrr_state" as usage is limited to arch/x86/kernel/cpu/mtrr
(and nothing outside of that directory even includes the local mtrr.h).

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://patch.msgid.link/20251112173944.1380633-3-seanjc%40google.com

Author: sean-jc

arch/x86/kernel/cpu/mtrr/generic.c

@@ -89,7 +89,6 @@ static int mtrr_state_set;
 u64 mtrr_tom2;
 
 struct mtrr_state_type mtrr_state;
-EXPORT_SYMBOL_GPL(mtrr_state);
 
 /* Reserved bits in the high portion of the MTRRphysBaseN MSR. */
 u32 phys_hi_rsvd;