mips: configs: loongson1: Update defconfig

mips: configs: loongson1: Update defconfig

Update loongson1_defconfig to reflect recent Kconfig changes:
- Replace CONFIG_MTD_NAND_LOONGSON1 with CONFIG_MTD_NAND_LOONGSON,
  since commit 7a1e3a452a57 ("mtd: rawnand: loongson1: Rename the
  prefix from ls1x to loongson").
- Enable CONFIG_ETHTOOL_NETLINK, since commit 9ff2aa4206ef ("net:
  ethtool: mm: extract stmmac verification logic into common library")
  makes STMMAC_ETH depend on it.

In addition:
- Enable CONFIG_JUMP_LABEL to allow optimized static branch handling.
- Disable unnecessary options.
- Enable CONFIG_TEST_DHRY as a module.

Fixes: 7a1e3a452a57 ("mtd: rawnand: loongson1: Rename the prefix from ls1x to loongson")
Fixes: 9ff2aa4206ef ("net: ethtool: mm: extract stmmac verification logic into common library")
Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>