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
3 files changed