xilinx: Introduce XILINX_MINI configuration

There is no common symbol which mini configurations are using and recent
get_mem_top() changes adding 1.3kB without having a way to remove it.
That's why introduce new symbol which can be used for removing features
which are not requested by these configurations.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/aa27b72e17057fa8cbdd92a2bbb863a31c8c1226.1731681053.git.michal.simek@amd.com
diff --git a/configs/xilinx_versal_mini_emmc1_defconfig b/configs/xilinx_versal_mini_emmc1_defconfig
index 3ae2115..6cb654c 100644
--- a/configs/xilinx_versal_mini_emmc1_defconfig
+++ b/configs/xilinx_versal_mini_emmc1_defconfig
@@ -12,6 +12,7 @@
 CONFIG_ENV_SIZE=0x80
 CONFIG_DEFAULT_DEVICE_TREE="versal-mini-emmc1"
 CONFIG_SYS_LOAD_ADDR=0x8000000
+CONFIG_XILINX_MINI=y
 # CONFIG_PSCI_RESET is not set
 # CONFIG_EXPERT is not set
 CONFIG_REMAKE_ELF=y