bios_table: Implement find attr entry by string handle

Implement find attribute table entry by string handle

Signed-off-by: John Wang <wangzqbj@inspur.com>
Change-Id: I884043df1b75e48d737bb37b8f0f724c32bb3334
diff --git a/libpldm/bios_table.h b/libpldm/bios_table.h
index 66d620f..cf25757 100644
--- a/libpldm/bios_table.h
+++ b/libpldm/bios_table.h
@@ -196,6 +196,16 @@
 pldm_bios_table_attr_find_by_handle(const void *table, size_t length,
 				    uint16_t handle);
 
+/** @brief Find an entry in attribute table by string handle
+ *  @param[in] table - The BIOS Attribute Table
+ *  @param[in] length - Length of the BIOS Attribute Table
+ *  @param[in] handle - The string handle
+ *  @return Pointer to the entry
+ */
+const struct pldm_bios_attr_table_entry *
+pldm_bios_table_attr_find_by_string_handle(const void *table, size_t length,
+					   uint16_t handle);
+
 /** @struct pldm_bios_table_attr_entry_enum_info
  *
  *  An auxiliary structure for passing parameters to @ref