Convert CONFIG_REMAKE_ELF to Kconfig

This converts the following to Kconfig:
   CONFIG_REMAKE_ELF

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
diff --git a/configs/khadas-vim2_defconfig b/configs/khadas-vim2_defconfig
index 81cff3c..9fbb039 100644
--- a/configs/khadas-vim2_defconfig
+++ b/configs/khadas-vim2_defconfig
@@ -10,6 +10,7 @@
 CONFIG_DEBUG_UART_CLOCK=24000000
 CONFIG_IDENT_STRING=" khadas-vim2"
 CONFIG_DEBUG_UART=y
+CONFIG_REMAKE_ELF=y
 CONFIG_SYS_LOAD_ADDR=0x1000000
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_CONSOLE_MUX=y