configs: tizen: Disable CONFIG_TOOLS_MKEFICAPSULE

configs: tizen: Disable CONFIG_TOOLS_MKEFICAPSULE

CONFIG_TOOLS_MKEFICAPSULE is enabled by EFI_LOADER after updating
version.
It needs to include some headers, but Tizen doesn't support packages.
To avoid a build failure, disable CONFIG_TOOLS_MKEFICAPSULE.

[   25s]   HOSTLD  tools/mkenvimage
[   25s]   HOSTLD  tools/dumpimage
[   25s] tools/mkeficapsule.c:21:10: fatal error: gnutls/gnutls.h: No such file or directory
[   25s]    21 | #include <gnutls/gnutls.h>
[   25s]       |          ^~~~~~~~~~~~~~~~~

Change-Id: I45e511ebd1c11f49d92c9de77395f954445c8cec
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>