target: Include missing 'cpu.h'

These target-specific files use the target-specific CPU state
but lack to include "cpu.h"; i.e.:

    ../target/riscv/pmp.h:61:23: error: unknown type name 'CPURISCVState'
    void pmpcfg_csr_write(CPURISCVState *env, uint32_t reg_index,
                          ^
    ../target/nios2/mmu.h:43:18: error: unknown type name 'CPUNios2State'
    void mmu_flip_um(CPUNios2State *env, unsigned int um);
                     ^
    ../target/microblaze/mmu.h:88:19: error: unknown type name 'CPUMBState'; did you mean 'CPUState'?
    uint32_t mmu_read(CPUMBState *env, bool ea, uint32_t rn);
                      ^~~~~~~~~~
                      CPUState

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220214183144.27402-10-f4bug@amsat.org>

target/microblaze/mmu.h

@@ -20,6 +20,8 @@
 #ifndef TARGET_MICROBLAZE_MMU_H
 #define TARGET_MICROBLAZE_MMU_H
 
+#include "cpu.h"
+
 #define MMU_R_PID    0
 #define MMU_R_ZPR    1
 #define MMU_R_TLBX   2

target/mips/internal.h

@@ -12,6 +12,7 @@
 #ifdef CONFIG_TCG
 #include "tcg/tcg-internal.h"
 #endif
+#include "cpu.h"
 
 /*
  * MMU types, the first four entries have the same layout as the

target/nios2/mmu.h

@@ -21,6 +21,8 @@
 #ifndef NIOS2_MMU_H
 #define NIOS2_MMU_H
 
+#include "cpu.h"
+
 typedef struct Nios2TLBEntry {
     target_ulong tag;
     target_ulong data;

target/riscv/pmp.h

@@ -22,6 +22,8 @@
 #ifndef RISCV_PMP_H
 #define RISCV_PMP_H
 
+#include "cpu.h"
+
 typedef enum {
     PMP_READ  = 1 << 0,
     PMP_WRITE = 1 << 1,