image: Add functions to obtain short names

Sometimes it is useful to obtain the short name for an Operating System,
architecture or compression mechanism. Provide functions for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/image.c b/common/image.c
index 7d3a543..26d6c9a 100644
--- a/common/image.c
+++ b/common/image.c
@@ -608,11 +608,9 @@
 	return (get_table_entry_name(uimage_type, "Unknown Image", type));
 }
 
-const char *genimg_get_type_short_name(uint8_t type)
+static const char *genimg_get_short_name(const table_entry_t *table, int val)
 {
-	const table_entry_t *table;
-
-	table = get_table_entry(uimage_type, type);
+	table = get_table_entry(table, val);
 	if (!table)
 		return "unknown";
 #if defined(USE_HOSTCC) || !defined(CONFIG_NEEDS_MANUAL_RELOC)
@@ -622,12 +620,32 @@
 #endif
 }
 
+const char *genimg_get_type_short_name(uint8_t type)
+{
+	return genimg_get_short_name(uimage_type, type);
+}
+
 const char *genimg_get_comp_name(uint8_t comp)
 {
 	return (get_table_entry_name(uimage_comp, "Unknown Compression",
 					comp));
 }
 
+const char *genimg_get_comp_short_name(uint8_t comp)
+{
+	return genimg_get_short_name(uimage_comp, comp);
+}
+
+const char *genimg_get_os_short_name(uint8_t os)
+{
+	return genimg_get_short_name(uimage_os, os);
+}
+
+const char *genimg_get_arch_short_name(uint8_t arch)
+{
+	return genimg_get_short_name(uimage_arch, arch);
+}
+
 /**
  * get_table_entry_id - translate short entry name to id
  * @table: pointer to a translation table for entries of a specific type