malta: update target configs and fix build warnings

Comment out some conflicting target configs that are set from subtarget
configs, which sometimes lead to kernel compile warnings:

  scripts/kconfig/conf  --syncconfig Kconfig
  net/sched/Kconfig:45: warning: menuconfig statement without prompt
  .config:1038:warning: override: CPU_MIPS32_R2 changes choice state

Signed-off-by: Tony Ambardar <[email protected]>

target/linux/malta/config-5.4

@@ -56,7 +56,7 @@ CONFIG_CPU_HAS_PREFETCH=y
 # CONFIG_CPU_HAS_SMARTMIPS is not set
 CONFIG_CPU_HAS_SYNC=y
 # CONFIG_CPU_MICROMIPS is not set
-CONFIG_CPU_MIPS32=y
+# CONFIG_CPU_MIPS32 is not set
 # CONFIG_CPU_MIPS32_3_5_FEATURES is not set
 # CONFIG_CPU_MIPS32_R1 is not set
 # CONFIG_CPU_MIPS32_R2 is not set
@@ -65,9 +65,9 @@ CONFIG_CPU_MIPS32=y
 # CONFIG_CPU_MIPS64_R2 is not set
 # CONFIG_CPU_MIPS32_R5_FEATURES is not set
 # CONFIG_CPU_MIPS64_R6 is not set
-CONFIG_CPU_MIPSR1=y
-CONFIG_CPU_MIPSR2_IRQ_EI=y
-CONFIG_CPU_MIPSR2_IRQ_VI=y
+# CONFIG_CPU_MIPSR2 is not set
+# CONFIG_CPU_MIPSR2_IRQ_EI is not set
+# CONFIG_CPU_MIPSR2_IRQ_VI is not set
 CONFIG_CPU_NEEDS_NO_SMARTMIPS_OR_MICROMIPS=y
 # CONFIG_CPU_NEVADA is not set
 CONFIG_CPU_R4K_CACHE_TLB=y