apm821xx: refresh 5.15 config

use the toolchain's default CPU (464fp) as the CPU option.
This fixes a CPU selection prompt which shows up now.

CPU selection
> 1. Generic 32 bits powerpc (POWERPC_CPU) (NEW)
  2. Rely on the toolchain's implicit default CPU (TOOLCHAIN_DEFAULT_CPU) (NEW)

Signed-off-by: Christian Lamparter <[email protected]>

target/linux/apm821xx/config-5.15

@@ -38,7 +38,6 @@ CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_CRC16=y
 # CONFIG_CRC32_SARWATE is not set
 CONFIG_CRC32_SLICEBY8=y
-CONFIG_CRYPTO_BLAKE2S=y
 CONFIG_CRYPTO_DEFLATE=y
 CONFIG_CRYPTO_DEV_PPC4XX=y
 CONFIG_CRYPTO_HW=y
@@ -76,7 +75,6 @@ CONFIG_GENERIC_BUG=y
 CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
 CONFIG_GENERIC_CLOCKEVENTS=y
 CONFIG_GENERIC_CMOS_UPDATE=y
-CONFIG_GENERIC_CPU=y
 CONFIG_GENERIC_CPU_AUTOPROBE=y
 CONFIG_GENERIC_EARLY_IOREMAP=y
 CONFIG_GENERIC_GETTIMEOFDAY=y
@@ -180,6 +178,7 @@ CONFIG_PHYSICAL_START=0x00000000
 CONFIG_PHYS_64BIT=y
 CONFIG_PHYS_ADDR_T_64BIT=y
 # CONFIG_PMU_SYSFS is not set
+# CONFIG_POWERPC_CPU is not set
 CONFIG_PPC=y
 CONFIG_PPC32=y
 CONFIG_PPC44x_SIMPLE=y
@@ -233,6 +232,7 @@ CONFIG_THREAD_INFO_IN_TASK=y
 CONFIG_THREAD_SHIFT=13
 CONFIG_TICK_CPU_ACCOUNTING=y
 CONFIG_TINY_SRCU=y
+CONFIG_TOOLCHAIN_DEFAULT_CPU=y
 CONFIG_USB_SUPPORT=y
 CONFIG_VDSO32=y
 # CONFIG_VIRTIO_MENU is not set