Add missing pgm_read_ptr{_near/_far} macros (#2160)

Author: unaiur

cores/esp8266/pgmspace.h

@@ -111,14 +111,17 @@ int	vsnprintf_P(char *str, size_t strSize, PGM_P formatP, va_list ap) __attribut
 
 #define pgm_read_dword(addr) 		(*reinterpret_cast<const uint32_t*>(addr))
 #define pgm_read_float(addr) 		(*reinterpret_cast<const float*>(addr))
+#define pgm_read_ptr(addr) 		(*reinterpret_cast<const void* const *>(addr))
 
 #define pgm_read_byte_near(addr) 	pgm_read_byte(addr)
 #define pgm_read_word_near(addr) 	pgm_read_word(addr)
 #define pgm_read_dword_near(addr) 	pgm_read_dword(addr)
 #define pgm_read_float_near(addr)	pgm_read_float(addr)
+#define pgm_read_ptr_near(addr) 	pgm_read_ptr(addr)
 #define pgm_read_byte_far(addr) 	pgm_read_byte(addr)
 #define pgm_read_word_far(addr) 	pgm_read_word(addr)
 #define pgm_read_dword_far(addr) 	pgm_read_dword(addr)
 #define pgm_read_float_far(addr) 	pgm_read_float(addr)
+#define pgm_read_ptr_far(addr)		pgm_read_ptr(addr)
 
 #endif //__PGMSPACE_H_