exec: provide tb_invalidate_phys_addr function

Allow TB invalidation by its physical address, extract implementation
from the breakpoint_invalidate function.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/exec-all.h b/exec-all.h
index fccce88..6bcc075 100644
--- a/exec-all.h
+++ b/exec-all.h
@@ -102,6 +102,7 @@
 void tlb_set_page(CPUArchState *env, target_ulong vaddr,
                   target_phys_addr_t paddr, int prot,
                   int mmu_idx, target_ulong size);
+void tb_invalidate_phys_addr(target_phys_addr_t addr);
 #endif
 
 #define CODE_GEN_ALIGN           16 /* must be >= of the size of a icache line */