arm: zynq: Enable bootz command for Xilinx platforms

bootz command is valid way how to boot Linux kernel. Enable it by
default.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

configs/zynq_zc702_defconfig

@@ -12,6 +12,7 @@ CONFIG_SPL=y
 CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Zynq> "
+CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_THOR_DOWNLOAD=y
 CONFIG_CMD_EEPROM=y
 CONFIG_CMD_DFU=y

configs/zynq_zc706_defconfig

@@ -11,6 +11,7 @@ CONFIG_SPL=y
 CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Zynq> "
+CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_THOR_DOWNLOAD=y
 CONFIG_CMD_EEPROM=y
 CONFIG_CMD_DFU=y

configs/zynq_zc770_xm010_defconfig

@@ -11,6 +11,7 @@ CONFIG_SPL=y
 CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Zynq> "
+CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_FPGA_LOADBP=y
 CONFIG_CMD_FPGA_LOADFS=y

configs/zynq_zc770_xm011_defconfig

@@ -12,6 +12,7 @@ CONFIG_SPL=y
 CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Zynq> "
+CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_FPGA_LOADBP=y
 CONFIG_CMD_FPGA_LOADFS=y

configs/zynq_zc770_xm012_defconfig

@@ -12,6 +12,7 @@ CONFIG_SPL=y
 CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Zynq> "
+CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_IMLS=y
 CONFIG_CMD_FPGA_LOADBP=y
 CONFIG_CMD_FPGA_LOADFS=y

configs/zynq_zc770_xm013_defconfig

@@ -12,6 +12,7 @@ CONFIG_SPL=y
 CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Zynq> "
+CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_FPGA_LOADBP=y
 CONFIG_CMD_FPGA_LOADFS=y

configs/zynq_zed_defconfig

@@ -10,6 +10,7 @@ CONFIG_SPL=y
 CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="Zynq> "
+CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_THOR_DOWNLOAD=y
 CONFIG_CMD_DFU=y
 # CONFIG_CMD_FLASH is not set