arm: zynq: Rework FPGA initialization

This commit moves the FPGA descriptor definition
to mach-zynq, where it makes more sense.

Based on patches from Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
and Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 2bbb86c..a7618f9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -821,6 +821,7 @@
 	imply CMD_CLK
 	imply FAT_WRITE
 	imply CMD_SPL
+	imply ARCH_EARLY_INIT_R
 
 config ARCH_ZYNQMP
 	bool "Xilinx ZynqMP based platform"