toradex: tdx-cfg-block: add EEPROM read/store wrappers

These functions wrap functionality for storing config blocks in EEPROM.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
diff --git a/board/toradex/common/Makefile b/board/toradex/common/Makefile
index 6b9fccb..7b19b6e 100644
--- a/board/toradex/common/Makefile
+++ b/board/toradex/common/Makefile
@@ -8,4 +8,5 @@
 else
 obj-$(CONFIG_TDX_CFG_BLOCK) += tdx-cfg-block.o
 obj-y += tdx-common.o
+obj-y += tdx-eeprom.o
 endif