xilinx: Remove SYS_MALLOC_F_LEN setup via board Kconfig

The commit e05689242238 ("Kconfig: Change SYS_MALLOC_F_LEN default to
0x2000") already setup default values from board Kconfigs that's why no
reason to duplicate it again.

Fixes: e05689242238 ("Kconfig: Change SYS_MALLOC_F_LEN default to 0x2000")
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/c3edd75b7a19d5cc205c9d5c37c2d86189ca3de6.1737380025.git.michal.simek@amd.com
diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig
index 265e9ce..376d1bc 100644
--- a/arch/arm/mach-zynq/Kconfig
+++ b/arch/arm/mach-zynq/Kconfig
@@ -43,9 +43,6 @@
 config SYS_SOC
 	default "zynq"
 
-config SYS_MALLOC_F_LEN
-	default 0x800
-
 config SYS_MALLOC_LEN
 	default 0x1400000
 
diff --git a/arch/arm/mach-zynqmp-r5/Kconfig b/arch/arm/mach-zynqmp-r5/Kconfig
index b2ba896..45d8c05 100644
--- a/arch/arm/mach-zynqmp-r5/Kconfig
+++ b/arch/arm/mach-zynqmp-r5/Kconfig
@@ -19,7 +19,4 @@
 	help
 	  The value, in Hz, that the CPU clock is running at.
 
-config SYS_MALLOC_F_LEN
-	default 0x600
-
 endif
diff --git a/arch/arm/mach-zynqmp/Kconfig b/arch/arm/mach-zynqmp/Kconfig
index 92d61e8..151cfad 100644
--- a/arch/arm/mach-zynqmp/Kconfig
+++ b/arch/arm/mach-zynqmp/Kconfig
@@ -93,9 +93,6 @@
 	help
 	  Size in bytes of the DRAM ECC bank2. A null size takes no action.
 
-config SYS_MALLOC_F_LEN
-	default 0x600
-
 config DEFINE_TCM_OCM_MMAP
 	bool "Define TCM and OCM memory in MMU Table"
 	default y if MP